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Technology during World War I (1914–1918) reflected a trend toward
industrialism Industrialisation ( alternatively spelled industrialization) is the period of social and economic change that transforms a human group from an agrarian society into an industrial society. This involves an extensive re-organisation of an econom ...
and the application of
mass-production Mass production, also known as flow production or continuous production, is the production of substantial amounts of standardized products in a constant flow, including and especially on assembly lines. Together with job production and bat ...
methods to
weapon A weapon, arm or armament is any implement or device that can be used to deter, threaten, inflict physical damage, harm, or kill. Weapons are used to increase the efficacy and efficiency of activities such as hunting, crime, law enforcement, ...
s and to the technology of warfare in general. This trend began at least fifty years prior to
World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...
during the
American Civil War The American Civil War (April 12, 1861 – May 26, 1865; also known by other names) was a civil war in the United States. It was fought between the Union ("the North") and the Confederacy ("the South"), the latter formed by states ...
of 1861–1865, and continued through many smaller conflicts in which soldiers and strategists tested new weapons. World War I weapons included types standardised and improved over the preceding period, together with some newly developed types using innovative
technology Technology is the application of knowledge to reach practical goals in a specifiable and Reproducibility, reproducible way. The word ''technology'' may also mean the product of such an endeavor. The use of technology is widely prevalent in me ...
and a number of improvised weapons used in trench warfare.
Military technology Military technology is the application of technology for use in warfare. It comprises the kinds of technology that are distinctly military in nature and not civilian in application, usually because they lack useful or legal civilian applicatio ...
of the time included important innovations in
machine gun A machine gun is a fully automatic, rifled autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifles) ar ...
s, grenades, and artillery, along with essentially new weapons such as submarines,
poison gas Many gases have toxic properties, which are often assessed using the LC50 (median lethal dose) measure. In the United States, many of these gases have been assigned an NFPA 704 health rating of 4 (may be fatal) or 3 (may cause serious or perman ...
,
warplane A military aircraft is any fixed-wing or rotary-wing aircraft that is operated by a legal or insurrectionary armed service of any type. Military aircraft can be either combat or non-combat: * Combat aircraft are designed to destroy enemy equi ...
s and
tanks A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and good battlefield mobility provided by tracks and a powerful engi ...
. The earlier years of the First World War could be characterized as a clash of 20th-century
technology Technology is the application of knowledge to reach practical goals in a specifiable and Reproducibility, reproducible way. The word ''technology'' may also mean the product of such an endeavor. The use of technology is widely prevalent in me ...
with 19th-century military science creating ineffective battles with huge numbers of casualties on both sides. On land, the quick descent into
trench warfare Trench warfare is a type of land warfare using occupied lines largely comprising military trenches, in which troops are well-protected from the enemy's small arms fire and are substantially sheltered from artillery. Trench warfare became ar ...
came as a surprise, and only in the final year of the war did the major armies make effective steps in revolutionizing matters of command and control and tactics to adapt to the modern battlefield and start to harness the myriad new technologies to effective military purposes. Tactical reorganizations (such as shifting the focus of command from the 100+ man company to the 10+ man squad) went hand-in-hand with armoured cars, the first submachine guns, and automatic rifles that a single individual soldier could carry and use.


Trench warfare

The new metallurgical and chemical industries created new firepower that briefly simplified defense before novel approaches to attack evolved. The application of infantry rifles, rifled
artillery Artillery is a class of heavy military ranged weapons that launch munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during siege ...
with
hydraulic recoil mechanism A hydraulic recoil mechanism is a way of limiting the effects of recoil and adding to the accuracy and firepower of an artillery piece. Description The usual recoil system in modern quick-firing guns is the hydro-pneumatic recoil system. I ...
s, barbed wire, zigzag trenches and
machine gun A machine gun is a fully automatic, rifled autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifles) ar ...
s made it difficult or nearly impossible to cross defended ground. The hand grenade, long used in crude form, developed rapidly as an aid in attacking trenches. Probably the most important was the introduction of high explosive shells, which dramatically increased the
lethality Lethality (also called deadliness or perniciousness) is how capable something is of causing death. Most often it is used when referring to diseases, chemical weapons, biological weapons, or their toxic chemical components. The use of this ter ...
of artillery over the 19th-century equivalents. Trench warfare led to the development of the concrete pill box, a small, hardened blockhouse that could be used to deliver machine gun fire. Pillboxes could be placed across a battlefield with interlocking fields of fire. Because attacking an entrenched enemy was so difficult,
tunnel warfare Tunnel warfare involves war being conducted in tunnel and other underground cavities. It often includes the construction of underground facilities (mining or undermining) in order to attack or defend, and the use of existing natural caves and ...
became a major effort during the war. Once enemy positions were undermined, huge amounts of explosives would be planted and detonated as part preparation for an overland charge. Sensitive listening devices that could detect the sounds of digging were a crucial method of defense against these underground incursions. The British proved especially adept at these tactics, thanks to the skill of their tunnel-digging "
sapper A sapper, also called a pioneer or combat engineer, is a combatant or soldier who performs a variety of military engineering duties, such as breaching fortifications, demolitions, bridge-building, laying or clearing minefields, preparing ...
s" and the sophistication of their listening devices. During the war, the immobility of
trench warfare Trench warfare is a type of land warfare using occupied lines largely comprising military trenches, in which troops are well-protected from the enemy's small arms fire and are substantially sheltered from artillery. Trench warfare became ar ...
and a need for protection from snipers created a requirement for loopholes both for discharging firearms and for observation.Trench Loopholes, Le Linge
/ref> Often a steel plate was used with a "key hole", which had a rotating piece to cover the loophole when not in use.


Clothing

The British and German armies had already changed from
red coat (British army) Red coat, also referred to as redcoat or scarlet tunic, was a military garment which was widely (though not exclusively) used by the infantry units of the British military, including the British Army and Royal Marines, from the 16th to 19th cen ...
(1902) or
Prussian blue Prussian blue (also known as Berlin blue, Brandenburg blue or, in painting, Parisian or Paris blue) is a dark blue pigment produced by oxidation of ferrous ferrocyanide salts. It has the chemical formula Fe CN)">Cyanide.html" ;"title="e(Cyani ...
(1910) for field uniforms, to less conspicuous
khaki The color khaki (, ) is a light shade of tan with a slight yellowish tinge. Khaki has been used by many armies around the world for uniforms and equipment, particularly in arid or desert regions, where it provides camouflage relative to sandy ...
or field gray.
Adolphe Messimy Adolphe Marie Messimy (31 January 1869 – 1 September 1935) was a French politician and general. He served as Minister of War in 1911–12 and then again for a few months during July Crisis, the outbreak of and first three weeks of the First Wor ...
,
Joseph Gallieni Joseph Simon Gallieni (24 April 1849 – 27 May 1916) was a French soldier, active for most of his career as a military commander and administrator in the French colonies. Gallieni is infamous in Madagascar as the French military leader who e ...
and other French leaders had proposed following suit, but the French army marched to war in their traditional red trousers, and only began receiving the new "
horizon blue Horizon blue is a colour name which is well remembered because it was used for the blue-grey uniforms of French metropolitan troops from 1915 through 1921. This name for a shade of blue which refers to the indefinable colour which separates th ...
" ones in 1915. A type of raincoat for British officers, introduced long before the war, gained fame as the
trench coat A trench coat or trenchcoat is a variety of coat made of waterproof heavy-duty fabric, originally developed for British Army officers before the First World War, and becoming popular while used in the trenches. Originally made from gabardine, ...
. The principal armies entered the war under cloth caps or leather helmets. They hastened to develop new steel helmets, in designs that became icons of their respective countries.


Observation trees

Observing the enemy in trench warfare was difficult, prompting the invention of technology such as the camouflage tree, a man made observation tower that enables forces to discreetly observe their enemy.


Artillery

In the 19th century, Britain and France exploited the rapid technical developments in
artillery Artillery is a class of heavy military ranged weapons that launch munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during siege ...
to serve a War of Movement. Such weapons served well in the colonial wars of that century, and served Germany very well in the Franco-Prussian War, but trench warfare was more like a
siege A siege is a military blockade of a city, or fortress, with the intent of conquering by attrition, or a well-prepared assault. This derives from la, sedere, lit=to sit. Siege warfare is a form of constant, low-intensity conflict characteriz ...
, and called for
siege gun Siege artillery (also siege guns or siege cannons) are heavy guns designed to bombard fortifications, cities, and other fixed targets. They are distinct from field artillery and are a class of siege weapon capable of firing heavy cannonballs o ...
s. The German army had already anticipated that a European war might require heavier artillery, hence had a more appropriate mix of sizes. Foundries responded to the actual situation with more heavy products and fewer highly mobile pieces. Germany developed the Paris guns of stupendous size and range. However, the necessarily stupendous muzzle velocity wore out a gun barrel after a few shots requiring a return to the factory for relining, so these weapons served more to frighten and anger urban people than to kill them or devastate their cities. At the beginning of the war, artillery was often sited in the front line to fire over open sights at enemy infantry. During the war, the following improvements were made: * Indirect
counter-battery fire Counter-battery fire (sometimes called counter-fire) is a battlefield tactic employed to defeat the enemy's indirect fire elements (multiple rocket launchers, artillery and mortars), including their target acquisition, as well as their command ...
was developed for the first time *
Forward observer An artillery observer, artillery spotter or forward observer (FO) is responsible for directing artillery and mortar fire onto a target. It may be a ''forward air controller'' (FAC) for close air support (CAS) and spotter for naval gunfire sup ...
s were used to direct artillery positioned out of direct line of sight from the targets, and sophisticated communications and fire plans were developed *
Artillery sound ranging In land warfare, artillery sound ranging is a method of determining the coordinates of a hostile battery using data derived from the sound of its guns (or mortar or rockets) firing. The same methods can also be used to direct artillery fire at ...
and
flash spotting Flash spotting''Artillery Survey in the First World War''. Field Survey Association, 1971, Sir Lawrence Bragg, Major General A. H. Dowson, Lt Colonel H. H. Hemmings was a military method of detecting the position of enemy guns at long range where ...
, for the location and eventual destruction of enemy batteries * Factors such as weather, air temperature, and barrel wear could for the first time be accurately measured and taken into account for
indirect fire Indirect fire is aiming and firing a projectile without relying on a direct line of sight between the gun and its target, as in the case of direct fire. Aiming is performed by calculating azimuth and inclination, and may include correcting aim ...
*The first "box barrage" in history was fired in the
Battle of Neuve Chapelle The Battle of Neuve Chapelle (10–13 March 1915) took place in the First World War in the Artois region of France. The attack was intended to cause a rupture in the German lines, which would then be exploited with a rush to the Aubers Ridge a ...
in 1915; this was the use of a three- or four-sided curtain of shell-fire to prevent the movement of enemy infantry * The
creeping barrage In military usage, a barrage is massed sustained artillery fire ( shelling) aimed at a series of points along a line. In addition to attacking any enemy in the kill zone, a barrage intends to suppress enemy movements and deny access across th ...
was perfected * The wire-cutting No. 106 fuze was developed, specifically designed to explode on contact with barbed wire, or the ground before the shell buried itself in mud, and equally effective as an anti-personnel weapon * The first anti-aircraft guns were devised out of necessity Field artillery entered the war with the idea that each gun should be accompanied by hundreds of shells, and armouries ought to have about a thousand on hand for resupply. This proved utterly inadequate when it became commonplace for a gun to sit in one place and fire a hundred shells or more per day for weeks or months on end. To meet the resulting
Shell Crisis of 1915 The Shell Crisis of 1915 was a shortage of artillery shells on the front lines in the First World War that led to a political crisis in the United Kingdom. Previous military experience led to an over-reliance on shrapnel to attack infantry in th ...
, factories were hastily converted from other purposes to make more ammunition. Railways to the front were expanded or built, leaving the question of the last mile.
Horses in World War I The use of horses in World War I marked a transitional period in the evolution of armed conflict. Cavalry units were initially considered essential offensive elements of a military force, but over the course of the war, the vulnerability of hor ...
were the main answer, and their high death rate seriously weakened the Central Powers late in the war. In many places the newly invented
trench railway Trench railways represented military adaptation of early 20th-century railway technology to the problem of keeping soldiers supplied during the static trench warfare phase of World War I. The large concentrations of soldiers and artillery at the f ...
s helped. The new motor
truck A truck or lorry is a motor vehicle designed to transport cargo, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame constructi ...
s as yet lacked pneumatic tires, versatile suspension, and other improvements that in later decades would allow them to perform well. The majority of casualties inflicted during the war were the result of artillery fire.


Poison gas

Chemical weapon A chemical weapon (CW) is a specialized munition that uses chemicals formulated to inflict death or harm on humans. According to the Organisation for the Prohibition of Chemical Weapons (OPCW), this can be any chemical compound intended as a ...
s were first used systematically in this war.
Chemical weapons in World War I The use of toxic chemicals as weapons dates back thousands of years, but the first large scale use of chemical weapons was during World War I. They were primarily used to demoralize, injure, and kill entrenched defenders, against whom the indisc ...
included phosgene,
tear gas Tear gas, also known as a lachrymator agent or lachrymator (), sometimes colloquially known as "mace" after the early commercial aerosol, is a chemical weapon that stimulates the nerves of the lacrimal gland in the eye to produce tears. In ...
, chlorarsines and mustard gas. At the beginning of the war, Germany had the most advanced chemical industry in the world, accounting for more than 80% of the world's dye and chemical production. Although the use of poison gas had been banned by the Hague Conventions of 1899 and 1907,
Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
turned to this industry for what it hoped would be a decisive weapon to break the deadlock of trench warfare.
Chlorine Chlorine is a chemical element with the symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine i ...
gas was first used on the battlefield in April 1915 at the
Second Battle of Ypres During the First World War, the Second Battle of Ypres was fought from for control of the tactically important high ground to the east and south of the Flemish town of Ypres in western Belgium. The First Battle of Ypres had been fought the pr ...
in
Belgium Belgium, ; french: Belgique ; german: Belgien officially the Kingdom of Belgium, is a country in Northwestern Europe. The country is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeast, France to th ...
. The unknown gas appeared to be a simple
smoke screen A smoke screen is smoke released to mask the movement or location of military units such as infantry, tanks, aircraft, or ships. Smoke screens are commonly deployed either by a canister (such as a grenade) or generated by a vehicle (such as ...
, used to hide attacking soldiers, and Allied troops were ordered to the front trenches to repel the expected attack. The gas had a devastating effect, killing many defenders or, when the wind direction changed and blew the gas back, many attackers. The wind being unreliable, another way had to be found to transmit the gas. It began being delivered in artillery shells. Later, mustard gas, phosgene and other gasses were used. Britain and France soon followed suit with their own gas weapons. The first defenses against gas were makeshift, mainly rags soaked in water or
urine Urine is a liquid by-product of metabolism in humans and in many other animals. Urine flows from the kidneys through the ureters to the urinary bladder. Urination results in urine being excreted from the body through the urethra. Cellular ...
. Later, relatively effective gas masks were developed, and these greatly reduced the effectiveness of gas as a weapon. Although it sometimes resulted in brief tactical advantages and probably caused over 1,000,000 casualties, gas seemed to have had no significant effect on the course of the war. Chemical weapons were easily attained, and cheap. Gas was especially effective against troops in trenches and bunkers that protected them from other weapons. Most chemical weapons attacked an individual's respiratory system. The concept of choking easily caused fear in soldiers and the resulting terror affected them psychologically. Because there was such a great fear of chemical weapons it was not uncommon that a soldier would panic and misinterpret symptoms of the common cold as being affected by a poisonous gas.


Command and control

The introduction of
radio telegraphy Wireless telegraphy or radiotelegraphy is transmission of text messages by radio waves, analogous to electrical telegraphy using cables. Before about 1910, the term ''wireless telegraphy'' was also used for other experimental technologies for t ...
was a significant step in communication during World War I. The stations utilized at that time were
spark-gap transmitter A spark-gap transmitter is an obsolete type of radio transmitter which generates radio waves by means of an electric spark."Radio Transmitters, Early" in Spark-gap transmitters were the first type of radio transmitter, and were the main type us ...
s. As an example, the information of the start of World War I was transmitted to
German South West Africa German South West Africa (german: Deutsch-Südwestafrika) was a colony of the German Empire from 1884 until 1915, though Germany did not officially recognise its loss of this territory until the 1919 Treaty of Versailles. With a total area of ...
on 2 August 1914 via radio telegraphy from the Nauen transmitter station via a relay station in
Kamina Kamina is the capital city of Haut-Lomami Province in the Democratic Republic of the Congo. Transport Kamina is known as an important railway node; three lines of the DRC railways run from Kamina toward the north, west, and south-east. The m ...
and
Lomé Lomé is the capital and largest city of Togo. It has an urban population of 837,437
in
Togo Togo (), officially the Togolese Republic (french: République togolaise), is a country in West Africa. It is bordered by Ghana to the west, Benin to the east and Burkina Faso to the north. It extends south to the Gulf of Guinea, where its c ...
to the radio station in Windhoek. In the early days of the war, generals tried to direct tactics from headquarters many miles from the front, with messages being carried back and forth by runners or
motorcycle courier A motorcycle courier, also known as a despatch rider or motorcycle messenger, is a courier using a motorcycle. Motorcycle couriers are common in the major urban centres of Europe, South America (especially Brazil), Asia and North America. ...
s. It was soon realized that more immediate methods of communication were needed.
Radio Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmi ...
sets of the period were too heavy to carry into battle, and
field telephone Field telephones are telephones used for military communications. They can draw power from their own battery, from a telephone exchange (via a central battery known as CB), or from an external power source. Some need no battery, being sound-powere ...
lines laid were quickly broken. Either one was subject to eavesdropping, and trench codes were not very satisfactory. Runners, flashing lights, and mirrors were often used instead; dogs were also used, but were only used occasionally as troops tended to adopt them as pets and men would volunteer to go as runners in the dog's place. There were also
aircraft An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engine ...
(called "contact patrols") that carried messages between headquarters and forward positions, sometimes dropping their messages without landing. Technical advances in radio, however, continued during the war and radio telephony was perfected, being most useful for airborne artillery spotters. The new long-range artillery developed just before the war now had to fire at positions it could not see. Typical tactics were to pound the enemy front lines and then stop to let infantry move forward, hoping that the enemy line was broken, though it rarely was. The lifting and then the
creeping barrage In military usage, a barrage is massed sustained artillery fire ( shelling) aimed at a series of points along a line. In addition to attacking any enemy in the kill zone, a barrage intends to suppress enemy movements and deny access across th ...
were developed to keep artillery fire landing directly in front of the infantry "as it advanced." Communications being impossible, the danger was that the barrage would move too fast — losing the protection — or too slowly — holding up the advance. There were also countermeasures to these artillery tactics: by aiming a counter barrage directly behind an enemy's creeping barrage, one could target the infantry that was following the creeping barrage. Microphones (
Sound ranging In land warfare, artillery sound ranging is a method of determining the coordinates of a hostile battery using data derived from the sound of its guns (or mortar or rockets) firing. The same methods can also be used to direct artillery fire at a ...
) were used to triangulate the position of enemy guns and engage in
counter-battery fire Counter-battery fire (sometimes called counter-fire) is a battlefield tactic employed to defeat the enemy's indirect fire elements (multiple rocket launchers, artillery and mortars), including their target acquisition, as well as their command ...
. Muzzle flashes of guns could also be spotted and used to target enemy artillery.


Railways

Railways dominated in this war as in no other. The German strategy was known beforehand by the Allies simply because of the vast marshaling yards on the Belgian border that had no other purpose than to deliver the mobilized German army to its start point. The German mobilization plan was little more than a vast detailed railway timetable. Men and material could get to the front at an unprecedented rate by rail, but trains were vulnerable at the front itself. Thus, armies could only advance at the pace that they could build or rebuild a railway, e.g. the British advance across Sinai. Motorized transport was only extensively used in the last two years of World War I. After the rail head, troops moved the last mile on foot, and guns and supplies were drawn by horses and
trench railways Trench railways represented military adaptation of early 20th-century railway technology to the problem of keeping soldiers supplied during the static trench warfare phase of World War I. The large concentrations of soldiers and artillery at the f ...
. Railways lacked the flexibility of motor transport and this lack of flexibility percolated through into the conduct during the war.


War of attrition

The countries involved in the war applied the full force of industrial mass-production to the manufacture of weapons and ammunition, especially artillery shells. Women on the home-front played a crucial role in this by working in munitions factories. This complete mobilization of a nation's resources, or "
total war Total war is a type of warfare that includes any and all civilian-associated resources and infrastructure as legitimate military targets, mobilizes all of the resources of society to fight the war, and gives priority to warfare over non-combata ...
" meant that not only the armies, but also the economies of the warring nations were in competition. For a time, in 1914–1915, some hoped that the war could be won through an attrition of
materiel Materiel (; ) refers to supplies, equipment, and weapons in military supply-chain management, and typically supplies and equipment in a commercial supply chain context. In a military context, the term ''materiel'' refers either to the specif ...
—that the enemy's supply of artillery shells could be exhausted in futile exchanges. But production was ramped up on both sides and hopes proved futile. In Britain the
Shell Crisis of 1915 The Shell Crisis of 1915 was a shortage of artillery shells on the front lines in the First World War that led to a political crisis in the United Kingdom. Previous military experience led to an over-reliance on shrapnel to attack infantry in th ...
brought down the British government, and led to the building of
HM Factory, Gretna H.M. Factory, Gretna was the United Kingdom's largest cordite factory in World War I. The government-owned facility was adjacent to the Solway Firth, near Gretna, Dumfries and Galloway. It was built by the Ministry of Munitions in response t ...
, a huge munitions factory on the English-Scottish border. The
war of attrition The War of Attrition ( ar, حرب الاستنزاف, Ḥarb al-Istinzāf; he, מלחמת ההתשה, Milhemet haHatashah) involved fighting between Israel and Egypt, Jordan, the Palestine Liberation Organisation (PLO) and their allies from ...
then focused on another resource: human lives. In the
Battle of Verdun The Battle of Verdun (french: Bataille de Verdun ; german: Schlacht um Verdun ) was fought from 21 February to 18 December 1916 on the Western Front in France. The battle was the longest of the First World War and took place on the hills north ...
in particular, German Chief of Staff
Erich Von Falkenhayn General Erich Georg Sebastian Anton von Falkenhayn (11 September 1861 – 8 April 1922) was the second Chief of the German General Staff of the First World War from September 1914 until 29 August 1916. He was removed on 29 August 1916 after t ...
hoped to "bleed France white" through repeated attacks on this French city. In the end, the war ended through a combination of attrition (of men and material), advances on the battlefield, arrival of American troops in large numbers, and a breakdown of morale and production on the German home-front due to an effective
naval blockade A navy, naval force, or maritime force is the branch of a nation's armed forces principally designated for naval and amphibious warfare; namely, lake-borne, riverine, littoral, or ocean-borne combat operations and related functions. It includ ...
of her seaports.


Air warfare

Aviation in World War I World War I was the first major conflict involving the large-scale use of aircraft. Tethered observation balloons had already been employed in several wars, and would be used extensively for artillery spotting. Germany employed Zeppelins for r ...
started with primitive aircraft, primitively used. Technological progress was swift, leading to ground attack,
tactical bombing Tactical bombing is aerial bombing aimed at targets of immediate military value, such as combatants, military installations, or military equipment. This is in contrast to strategic bombing, or attacking enemy cities and factories to crippl ...
, and highly publicized, deadly
dogfight A dogfight, or dog fight, is an aerial battle between fighter aircraft conducted at close range. Dogfighting first occurred in Mexico in 1913, shortly after the invention of the airplane. Until at least 1992, it was a component in every majo ...
s among aircraft equipped with forward-firing, synchronized
machine gun A machine gun is a fully automatic, rifled autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifles) ar ...
s from July 1915 onwards. However, these uses made a lesser impact on the war than more mundane roles in intelligence, sea patrol and especially artillery spotting.
Antiaircraft warfare Anti-aircraft warfare, counter-air or air defence forces is the battlespace response to aerial warfare, defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It includes surface based, ...
also had its beginnings in this war. As with most technologies, aircraft and their use underwent many improvements during World War I. As the initial war of movement on the Western Front settled into trench warfare,
aerial reconnaissance Aerial reconnaissance is reconnaissance for a military or strategic purpose that is conducted using reconnaissance aircraft. The role of reconnaissance can fulfil a variety of requirements including artillery spotting, the collection of i ...
over the front added to the difficulty of mounting surprise attacks against entrenched and concealed defenders. Manned observation balloons floating high above the trenches were used as stationary observation posts, reporting enemy troop positions and directing artillery fire. Balloons commonly had a crew of two, each equipped with parachutes: upon an enemy air attack on the flammable balloon, the crew would jump to safety. At the time, parachutes were too heavy to be used by pilots in aircraft, and smaller versions would not be developed until the end of the war. (In the British case, there arose concerns that they might undermine
morale Morale, also known as esprit de corps (), is the capacity of a group's members to maintain belief in an institution or goal, particularly in the face of opposition or hardship. Morale is often referenced by authority figures as a generic value ...
, effectively encouraging
cowardice Cowardice is a trait wherein excessive fear prevents an individual from taking a risk or facing danger. It is the opposite of courage. As a label, "cowardice" indicates a failure of character in the face of a challenge. One who succumbs to cowa ...
.) Recognized for their value as observer platforms, observation balloons were important targets of enemy aircraft. To defend against air attack, they were heavily protected by large concentrations of anti-aircraft guns and patrolled by friendly aircraft. While early air spotters were unarmed, they soon began firing at each other with handheld weapons. An arms race commenced, quickly leading to increasingly agile planes equipped with machine guns. A key innovation was the interrupter gear, a Dutch invention that allowed a machine gun to be mounted behind the propeller so the pilot could fire directly ahead, along the plane's flight path. As the stalemate developed on the ground, with both sides unable to advance even a few miles without a major battle and thousands of casualties, planes became greatly valued for their role gathering intelligence on enemy positions. They also bombed enemy supplies behind the trench lines, in the manner of later attack aircraft. Large planes with a pilot and an observer were used to reconnoiter enemy positions and bomb their supply bases. These large and slow planes made easy targets for enemy fighter planes, who in turn were met by fighter escorts and spectacular aerial dogfights.
German strategic bombing during World War I German(s) may refer to: * Germany (of or related to) **Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ger ...
struck Warsaw, Paris, London and other cities. Germany led the world in
Zeppelin A Zeppelin is a type of rigid airship named after the German inventor Count Ferdinand von Zeppelin () who pioneered rigid airship development at the beginning of the 20th century. Zeppelin's notions were first formulated in 1874Eckener 1938, pp ...
s, and used these airships to make occasional bombing raids on military targets, London and other British cities, without great effect. Later in the war, Germany introduced long range strategic bombers. Damage was again minor but they forced the British air forces to maintain squadrons of fighters in England to defend against air attack, depriving the British Expeditionary Force of planes, equipment, and personnel badly needed on the Western front. The Allies made much smaller efforts in bombing the Central Powers.


Mobility

In the early days of the war,
armoured cars Armored (or armoured) car or vehicle may refer to: Wheeled armored vehicles * Armoured fighting vehicle, any armed combat vehicle protected by armor ** Armored car (military), a military wheeled armored vehicle * Armored car (valuables), an arm ...
armed with machine guns were organized into combat units, along with cyclist infantry and machine guns mounted on motor cycle sidecars. Though not able to assault entrenched positions, they provided mobile fire support to infantry, and performed scouting, reconnaissance, and other roles similar to cavalry. After trench warfare took hold of major battle-lines, opportunities for such vehicles greatly diminished, though they continued to see use in the more open campaigns in Russia and the Middle East. Between late 1914 and early 1918, the Western Front hardly moved. When the
Russian Empire The Russian Empire was an empire and the final period of the Russian monarchy from 1721 to 1917, ruling across large parts of Eurasia. It succeeded the Tsardom of Russia following the Treaty of Nystad, which ended the Great Northern War. ...
surrendered after the
October Revolution The October Revolution,. officially known as the Great October Socialist Revolution. in the Soviet Union, also known as the Bolshevik Revolution, was a revolution in Russia led by the Bolshevik Party of Vladimir Lenin that was a key mome ...
in 1917, Germany was able to move many troops to the Western Front. With new stormtrooper infantry trained in
infiltration tactics In warfare, infiltration tactics involve small independent light infantry forces advancing into enemy rear areas, bypassing enemy frontline strongpoints, possibly isolating them for attack by follow-up troops with heavier weapons. Soldiers ...
to exploit enemy weak points and penetrate into rear areas, they launched a series of offensives in the spring of 1918. In the largest of these,
Operation Michael Operation Michael was a major German military offensive during the First World War that began the German Spring Offensive on 21 March 1918. It was launched from the Hindenburg Line, in the vicinity of Saint-Quentin, France. Its goal was t ...
, General
Oskar von Hutier Oskar Emil von Hutier (27 August 1857 – 5 December 1934) was a German general during the First World War. He served in the German Army from 1875 to 1919, including war service. During the war, he commanded the army that took Riga, Russian Repub ...
pushed forward 60 kilometers, gaining in a couple weeks what France and Britain had spent years to achieve. Although initially successful tactically, these offensives stalled after outrunning their horse-drawn supply, artillery, and reserves, leaving German forces weakened and exhausted. In the Battle of Amiens of August 1918, the Triple Entente forces began a counterattack that would be called the " Hundred Days Offensive." The Australian and Canadian divisions that spearheaded the attack managed to advance 13 kilometers on the first day alone. These battles marked the end of trench warfare on the Western Front and a return to mobile warfare. The mobile personnel shield was a less successful attempt at restoring mobility.Gougaud, p.110 After the war, the defeated Germans would seek to combine their infantry-based mobile warfare of 1918 with vehicles, eventually leading to '' blitzkrieg'', or 'lightning warfare'.


Tanks

Although the concept of the
tank A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and good battlefield mobility provided by tracks and a powerful engi ...
had been suggested as early as the 1890s, authorities showed little more than a passing interest in them until the trench stalemate of World War I caused reconsideration. In early 1915, the British
Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against ...
and French industrialists both started dedicated development of tanks. Basic tank design combined several existing technologies. It included armour plating thick enough to be proof against all standard infantry arms, caterpillar track for mobility over the shell-torn battlefield, the four-stroke gasoline powered
internal combustion engine An internal combustion engine (ICE or IC engine) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal c ...
(refined in the 1870s), and heavy firepower, provided by the same machine guns which had recently become so dominant in warfare, or even light artillery guns. In Britain, a
committee A committee or commission is a body of one or more persons subordinate to a deliberative assembly. A committee is not itself considered to be a form of assembly. Usually, the assembly sends matters into a committee as a way to explore them more ...
was formed to work out a practical tank design. The outcome was large tanks with a
rhomboidal Traditionally, in two-dimensional geometry, a rhomboid is a parallelogram in which adjacent sides are of unequal lengths and angles are non-right angled. A parallelogram with sides of equal length ( equilateral) is a rhombus but not a rhomboid. ...
shape, to allow crossing of an trench: the
Mark I tank British heavy tanks were a series of related armoured fighting vehicles developed by the UK during the First World War. The Mark I was the world's first tank, a tracked, armed, and armoured vehicle, to enter combat. The name "tank" was initial ...
, with the "male" versions mounting small naval guns and machine guns, and the "female" carrying only machine guns. In France, several competing arms industry organizations each proposed radically different designs. Smaller tanks became favored, leading to the Renault FT tank, in part by being able to leverage the engines and manufacturing techniques of commercial tractors and automobiles. Although the tanks' initial appearance on the battlefield in 1916 terrified some German troops, such engagements provided more opportunities for development than battle successes. Early tanks were unreliable, breaking down often. Germans learned they were vulnerable to direct hits from field artillery and heavy mortars, their trenches were widened and other obstacles devised to halt them, and special
anti-tank rifle An anti-tank rifle is an anti-materiel rifle designed to penetrate the armor of armored fighting vehicles, most commonly tanks, armored personnel carriers, and infantry fighting vehicles. The term is usually used for weapons that can be carri ...
s were rapidly developed. Also, both Britain and France found new tactics and training were required to make effective use of their tanks, such as larger coordinated formations of tanks and close support with infantry. Once tanks could be organized in the hundreds, as in the opening assault of the Battle of Cambrai in November 1917, they began to have notable impact. Throughout the remainder of the war, new tank designs often revealed flaws in battle, to be addressed in later designs, but reliability remained the primary weakness of tanks. In the Battle of Amiens, a major Entente counteroffensive near the end of the war, British forces went to field with 532 tanks; after several days, only a few were still in commission, with those that suffered mechanical difficulties outnumbering those disabled by enemy fire. Germany utilized many captured enemy tanks, and made a few of their own late in the war. In the last year of the war, despite rapidly increasing production (especially by France) and improving designs, tank technology struggled to make more than a modest impact on the war's overall progress. Plan 1919 proposed the future use of massive tank formations in great offensives combined with
ground attack aircraft An attack aircraft, strike aircraft, or attack bomber is a tactical military aircraft that has a primary role of carrying out airstrikes with greater precision than bombers, and is prepared to encounter strong low-level air defenses while pres ...
. Even without achieving the decisive results hoped for during World War I, tank technology and
mechanized warfare Armoured warfare or armored warfare (mechanized forces, armoured forces or armored forces) (American English; see spelling differences), is the use of armored fighting vehicles in modern warfare. It is a major component of modern methods of ...
had been launched and would grow increasingly sophisticated in the years following the war. By
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...
, the tank would evolve into a fearsome weapon critical to restoring mobility to land warfare.


At sea

The years leading up to the war saw the use of improved metallurgical and mechanical techniques to produce larger ships with larger guns and, in reaction, more armour. The launching of
HMS Dreadnought (1906) HMS ''Dreadnought'' was a Royal Navy battleship whose design revolutionised naval power. The ship's entry into service in 1906 represented such an advance in naval technology that her name came to be associated with an entire generation of ba ...
revolutionized battleship construction, leaving many ships obsolete before they were completed. German ambitions brought an
Anglo-German naval arms race The arms race between Great Britain and Germany that occurred from the last decade of the nineteenth century until the advent of World War I in 1914 was one of the intertwined causes of that conflict. While based in a bilateral relationship tha ...
in which the
Imperial German Navy The Imperial German Navy or the Imperial Navy () was the navy of the German Empire, which existed between 1871 and 1919. It grew out of the small Prussian Navy (from 1867 the North German Federal Navy), which was mainly for coast defence. Kaise ...
was built up from a small force to the world's most modern and second most powerful. However, even this high-technology navy entered the war with a mix of newer ships and obsolete older ones. The advantage was in long-range gunnery, and naval battles took place at far greater distances than before. The 1916 Battle of Jutland demonstrated the excellence of German ships and crews, but also showed that the
High Seas Fleet The High Seas Fleet (''Hochseeflotte'') was the battle fleet of the German Imperial Navy and saw action during the First World War. The formation was created in February 1907, when the Home Fleet (''Heimatflotte'') was renamed as the High Seas ...
was not big enough to challenge openly the British blockade of Germany. It was the only full-scale battle between fleets in the war. Having the largest surface fleet, the United Kingdom sought to press its advantage. British ships blockaded German ports, hunted down German and Austro-Hungarian ships wherever they might be on the high seas, and supported actions against
German colonies German(s) may refer to: * Germany (of or related to) **Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Ge ...
. The German surface fleet was largely kept in the North Sea. This situation pushed Germany, in particular, to direct its resources to a new form of naval power: submarines.
Naval mine A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, any ...
s were deployed in hundreds of thousands, or far greater numbers than in previous wars. Submarines proved surprisingly effective for this purpose. Influence mines were a new development but moored contact mines were the most numerous. They resembled those of the late 19th century, improved so they less often exploded while being laid. The Allies produced enough mines to build the
North Sea Mine Barrage The North Sea Mine Barrage, also known as the Northern Barrage, was a large minefield laid easterly from the Orkney Islands to Norway by the United States Navy (assisted by the Royal Navy) during World War I. The objective was to inhibit the m ...
to help bottle the Germans into the
North Sea The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea, epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the ...
, but it was too late to make much difference.


Submarines

World War I was the first conflict in which submarines were a serious weapon of war. In the years shortly before the war, the relatively sophisticated propulsion system of diesel power while surfaced and battery power while submerged was introduced. Their armament had similarly improved, but few were in service. Germany had already increased production and quickly built up its
U-boat U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. Although at times they were efficient fleet weapons against enemy naval warships, they were most effectively used in an economic warfare ro ...
fleet, both for action against British warships and for a counterblockade of the British Isles. 360 were eventually built. The resulting
U-boat Campaign (World War I) The U-boat Campaign from 1914 to 1918 was the World War I naval campaign fought by German U-boats against the trade routes of the Allies. It took place largely in the seas around the British Isles and in the Mediterranean. The German Empire r ...
destroyed more enemy warships than the High Seas Fleet had, and hampered British war supplies as the more expensive surface fleet had not. The United Kingdom relied heavily on imports to feed its population and supply its war industry, and the German Navy hoped to blockade and starve Britain using
U-boats U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. Although at times they were efficient fleet weapons against enemy naval warships, they were most effectively used in an economic warfare rol ...
to attack merchant ships. Lieutenant Otto Weddigen remarked of the second submarine attack of the Great War: : Submarines soon came under persecution by
submarine chasers A submarine chaser or subchaser is a small naval vessel that is specifically intended for anti-submarine warfare. Many of the American submarine chasers used in World War I found their way to Allied nations by way of Lend-Lease in World War II. ...
and other small warships using hastily devised
anti-submarine weapons An anti-submarine weapon (ASW) is any one of a number of devices that are intended to act against a submarine and its crew, to destroy (sink) the vessel or reduce its capability as a weapon of war. In its simplest sense, an anti-submarine weapo ...
. They could not impose an effective blockade while acting under the restrictions of the
prize rules In admiralty law prizes are equipment, vehicles, vessels, and cargo captured during armed conflict. The most common use of ''prize'' in this sense is the capture of an enemy ship and her cargo as a prize of war. In the past, the capturing forc ...
and international law of the sea. They resorted to
unrestricted submarine warfare Unrestricted submarine warfare is a type of naval warfare in which submarines sink merchant ships such as freighters and tankers without warning, as opposed to attacks per prize rules (also known as "cruiser rules") that call for warships to s ...
, which cost Germany public sympathy in neutral countries and was a factor contributing to the
American entry into World War I American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, p ...
. This struggle between German submarines and British countermeasures became known as the "
First Battle of the Atlantic The Atlantic U-boat campaign of World War I (sometimes called the "First Battle of the Atlantic", in reference to the World War II campaign of that name) was the prolonged naval conflict between German submarines and the Allied navies in Atla ...
." As German submarines became more numerous and effective, the British sought ways to protect their merchant ships. "
Q-ship Q-ships, also known as Q-boats, decoy vessels, special service ships, or mystery ships, were heavily armed merchant ships with concealed weaponry, designed to lure submarines into making surface attacks. This gave Q-ships the chance to open f ...
s," attack vessels disguised as civilian ships, were one early strategy. Consolidating merchant ships into
convoys A convoy is a group of vehicles, typically motor vehicles or ships, traveling together for mutual support and protection. Often, a convoy is organized with armed defensive support and can help maintain cohesion within a unit. It may also be used ...
protected by one or more armed navy vessels was adopted later in the war. There was initially a great deal of debate about this approach, out of fear that it would provide German U-boats with a wealth of convenient targets. Thanks to the development of active and passive
sonar Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances (ranging), communicate with or detect objects on o ...
devices, coupled with increasingly deadly
anti-submarine weapon An anti-submarine weapon (ASW) is any one of a number of devices that are intended to act against a submarine and its crew, to destroy (sink) the vessel or reduce its capability as a weapon of war. In its simplest sense, an anti-submarine weapo ...
s, the convoy system reduced British losses to U-boats to a small fraction of their former level.
Holland 602 type submarine The Holland 602 type submarine, also known as the H-class submarine, was one of the most numerous submarines of World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disas ...
s and other Allied types were fewer, being unnecessary for the blockade of Germany.


Small arms

Infantry weapons for major powers were mainly
bolt-action Bolt-action is a type of manual firearm action that is operated by ''directly'' manipulating the bolt via a bolt handle, which is most commonly placed on the right-hand side of the weapon (as most users are right-handed). Most bolt-action ...
rifles, capable of firing ten or more rounds per minute. German soldiers carried
Gewehr 98 The Gewehr 98 (abbreviated G98, Gew 98, or M98) is a German bolt-action rifle made by Mauser, firing cartridges from a five-round internal clip-loaded magazine. It was the German service rifle from 1898 to 1935, when it was replaced by the Kar ...
rifle in 8mm mauser, the British carried the Short Magazine Lee–Enfield rifle, and the US military employed the
M1903 Springfield The M1903 Springfield, officially the United States Rifle, Caliber .30-06, Model 1903, is an American five-round magazine-fed, bolt-action service repeating rifle, used primarily during the first half of the 20th century. The M1903 was first ...
and
M1917 Enfield The M1917 Enfield, the "American Enfield", formally named "United States Rifle, cal .30, Model of 1917" is an American modification and production of the .303-inch (7.7 mm) Pattern 1914 Enfield (P14) rifle (listed in British Service as Rifle No. ...
. Rifles with
telescopic sight A telescopic sight, commonly called a scope informally, is an optical sighting device based on a refracting telescope. It is equipped with some form of a referencing pattern – known as a '' reticle'' – mounted in a focally appropriate ...
s were used by
snipers A sniper is a military/paramilitary marksman who engages targets from positions of concealment or at distances exceeding the target's detection capabilities. Snipers generally have specialized training and are equipped with high-precision ri ...
, and were first used by the Germans. Machine guns were also used by great powers; both sides used the
Maxim gun The Maxim gun is a recoil-operated machine gun invented in 1884 by Hiram Stevens Maxim. It was the first fully automatic machine gun in the world. The Maxim gun has been called "the weapon most associated with imperial conquest" by historian ...
, a fully automatic
belt-fed upright=1.35, An M60 machine gun belt loaded with 7.62×51mm NATO cartridges, aboard a U.S. Navy">7.62×51mm_NATO.html" ;"title="M60 machine gun belt loaded with 7.62×51mm NATO">M60 machine gun belt loaded with 7.62×51mm NATO cartridges, aboar ...
weapon, capable of long-term sustained use provided it was supplied to adequate amounts of ammunition and cooling water, and its French counterpart, the
Hotchkiss M1914 machine gun The Mle 1914 Hotchkiss machine gun chambered for the 8mm Lebel cartridge became the standard machine gun of the French Army during the latter half of World War I. It was manufactured by the French arms company Hotchkiss et Cie, which had been es ...
. Their use in defense, combined with barbed
wire obstacle In the military science of fortification, wire obstacles are defensive obstacles made from barbed wire, barbed tape or concertina wire. They are designed to disrupt, delay and generally slow down an attacking enemy. During the time that the at ...
s, converted the expected mobile battlefield to a static one. The machine gun was useful in stationary battle but could not move easily through a battlefield, and therefore forced soldiers to face enemy machine guns without machine guns of their own. Before the war, the French Army studied the question of a
light machine gun A light machine gun (LMG) is a light-weight machine gun designed to be operated by a single infantryman, with or without an assistant, as an infantry support weapon. LMGs firing cartridges of the same caliber as the other riflemen of the sa ...
but had made none for use. At the start of hostilities, France quickly turned an existing prototype (the "CS" for Chauchat and Sutter) into the lightweight Chauchat M1915 automatic rifle with a high rate of fire. Besides its use by the French, the first American units to arrive in France used it in 1917 and 1918. Hastily mass-manufactured under desperate wartime pressures, the weapon developed a reputation for unreliability. Seeing the potential of such a weapon, the British Army adopted the American-designed Lewis gun chambered in .303 British. The Lewis gun was the first true light machine gun that could in theory be operated by one man, though in practice the bulky ammo pans required an entire section of men to keep the gun operating. The Lewis Gun was also used for
marching fire Marching fire, also known as walking fire, is a military tactic – a form of suppressive fire used during an infantry assault or combined arms assault. Advancing units fire their weapons without stopping to aim, in an attempt to pin down enemy d ...
, notably by the
Australian Corps The Australian Corps was a World War I army corps that contained all five Australian infantry divisions serving on the Western Front. It was the largest corps fielded by the British Empire in France. At its peak the Australian Corps numbered 10 ...
in the July 1918 Battle of Hamel. To serve the same purpose, the German Army adopted the MG08/15 which was impractically heavy at counting the water for cooling and one belt of ammunition holding 100 rounds. In 1918 the
M1918 Browning Automatic Rifle The Browning Automatic Rifle (BAR) is a family of American automatic rifles and machine guns used by the United States and numerous other countries during the 20th century. The primary variant of the BAR series was the M1918, chambered for the ...
(BAR) was introduced in the US military, the weapon was an "automatic rifle" and like the Chauchat was designed with the concept of walking fire in mind. The tactic was to be employed under conditions of limited field of fire and poor visibility such as advancing through woods. Early
submachine guns A submachine gun (SMG) is a magazine-fed, automatic carbine designed to fire handgun cartridges. The term "submachine gun" was coined by John T. Thompson, the inventor of the Thompson submachine gun, to describe its design concept as an automati ...
were much used near the end of the war, such as the
MP-18 The MP 18, manufactured by Theodor Bergmann ''Abteilung Waffenbau'', was arguably the first submachine gun used in combat. It was introduced into service in 1918 by the German Army during World War I as the primary weapon of the ''Sturmtruppen'', ...
. The US military deployed
combat shotgun A combat shotgun is a shotgun issued by militaries for warfare. The earliest shotguns specifically designed for combat were the trench guns or trench shotguns issued in World War I. While limited in range, the multiple projectiles typically u ...
s, commonly known as ''trench guns''. American troops used Winchester Models 1897 and 1912 short-barreled pump action shotguns loaded with 6 rounds containing
antimony Antimony is a chemical element with the symbol Sb (from la, stibium) and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite (Sb2S3). Antimony compounds have been known since ancient t ...
hardened 00 buckshot to clear enemy trenches. Pump actions can be fired rapidly, simply by working the slide when the trigger is held down, and when fighting within a trench, the shorter shotgun could be rapidly turned and fired in the opposite direction along the trench axis. The shotguns prompted a diplomatic protest from Germany, claiming the shotguns caused excessive injury, and that any U.S. combatants found in possession of them would be subject to execution. The U.S. rejected the claims, and threatened reprisals in kind if any of its troops were executed for possession of a shotgun.


Grenades

Grenades A grenade is an explosive weapon typically thrown by hand (also called hand grenade), but can also refer to a shell (explosive projectile) shot from the muzzle of a rifle (as a rifle grenade) or a grenade launcher. A modern hand grenade gene ...
proved to be effective weapons in the trenches. When the war started, grenades were few and poor. Hand grenades were used and improved throughout the war.
Contact fuze A contact fuze, impact fuze, percussion fuze or direct-action (D.A.) fuze (''UK'') is the fuze that is placed in the nose of a bomb or shell so that it will detonate on contact with a hard surface. Many impacts are unpredictable: they may involve ...
s became less common, replaced by time fuzes. The British entered the war with the long-handled impact detonating " Grenade, Hand No 1".Bull, Stephen (2002) ''World War 1 Trench Warfare; (1): 1914-16''. Oxford: Osprey Publishing; p. 27 This was replaced by the No. 15 "Ball Grenade" to partially overcome some of its inadequacies. An
improvised Improvisation is the activity of making or doing something not planned beforehand, using whatever can be found. Improvisation in the performing arts is a very spontaneous performance without specific or scripted preparation. The skills of impr ...
hand grenade was developed in Australia for use by ANZAC troops called the Double Cylinder "jam tin" which consisted of a tin filled with dynamite or
guncotton Nitrocellulose (also known as cellulose nitrate, flash paper, flash cotton, guncotton, pyroxylin and flash string, depending on form) is a highly flammable compound formed by nitrating cellulose through exposure to a mixture of nitric acid and ...
, packed round with scrap metal or stones. To ignite, at the top of the tin there was a Bickford safety fuse connecting the detonator, which was lit by either the user, or a second person. The "
Mills bomb "Mills bomb" is the popular name for a series of British hand grenades which were designed by William Mills. They were the first modern fragmentation grenades used by the British Army and saw widespread use in the First and Second World Wa ...
" (Grenade, Hand No. 5) was introduced in 1915 and would serve in its basic form in the British Army until the 1970s. Its improved fusing system relied on the soldier removing a pin and while holding down a lever on the side of the grenade. When the grenade was thrown the safety lever would automatically release, igniting the grenade's internal fuse which would burn down until the grenade detonated. The French would use the F1 defensive grenade. The major grenades used in the beginning by the German Army were the impact-detonating " discus" or "oyster shell" bomb and the Mod 1913 black powder ''
Kugelhandgranate The ''Kugelhandgranate'' ('ball hand grenade') is a model of hand thrown fragmentation grenade manufactured in Germany, also known as Mod. 1913. M1915 Kugelhandgranate NA By 1915, German industry was preparing for a long war and resources were ...
'' with a friction-ignited time fuse. In 1915 Germany developed the much more effective '' Stielhandgranate'', nicknamed "potato masher" for its shape, whose variants remained in use for decades; it used a timed fuse system similar to the Mills bomb. Hand grenades were not the only attempt at projectile explosives for infantry. A
rifle grenade A rifle grenade is a grenade that uses a rifle-based launcher to permit a longer effective range than would be possible if the grenade were thrown by hand. The practice of projecting grenades with rifle-mounted launchers was first widely used dur ...
was brought into the trenches to attack the enemy from a greater distance. The Hales rifle grenade got little attention from the British Army before the war began but, during the war, Germany showed great interest in this weapon. The resulting casualties for the Allies caused Britain to search for a new defense. The Stokes mortar, a lightweight and very portable trench mortar with short tube and capable of
indirect fire Indirect fire is aiming and firing a projectile without relying on a direct line of sight between the gun and its target, as in the case of direct fire. Aiming is performed by calculating azimuth and inclination, and may include correcting aim ...
, was rapidly developed and widely imitated.Duffy, Michael (2000-07) "Safe Surf". http://www.firstworldwar.com/weaponry/mortars.htm Mechanical bomb throwers of lesser range were used in a similar fashion to fire upon the enemy from a safe distance within the trench. The Sauterelle was a grenade launching
Crossbow A crossbow is a ranged weapon using an elastic launching device consisting of a bow-like assembly called a ''prod'', mounted horizontally on a main frame called a ''tiller'', which is hand-held in a similar fashion to the stock of a long fire ...
used before the Stokes mortar by French and British troops.


Flamethrowers

The Imperial German Army deployed flamethrowers () on the Western Front attempting to flush out French or British soldiers from their trenches. Introduced in 1915, it was used with greatest effect during the Hooge battle of the Western Front on 30 July 1915. The German Army had two main types of flame throwers during the Great War: a small single person version called the Kleinflammenwerfer and a larger crew served configuration called the Grossflammenwerfer. In the latter, one soldier carried the fuel tank while another aimed the nozzle. Both the large and smaller versions of the flame-thrower were of limited use because their short range left the exposed to small arms fire.


See also

*
List of German weapons of World War I This is a list of German weapons of World War I. Infantry weapons * Bayard M1908 (semi-automatic pistol) * Beholla M1915 (pistol) * Bergmann–Bayard M1910 (semi-automatic pistol) * Bergmann MP 18-I (submachine gun) * Dreyse M1907 (semi-au ...
*
Romanian military equipment of World War I During World War I, the Kingdom of Romania was a source of various types of military equipment. Either directly, or indirectly through Romanian-born people designing military equipment abroad. Munitions and related equipment Between 1914 and 1916, ...


References


External links

* Johnson, Jeffrey
Science and Technology
, in

* ttp://www.europeanfilmgateway.eu/node/33/World%20War,%201914-1918%20Technology/multilingual:1/showOnly:video Historical film documents on technology during World War I at www.europeanfilmgateway.eu * Zabecki, David T.
Military Developments of World War I
, in

* Audoin-Rouzeau, Stéphane
Weapons
, in

* Pöhlmann, Markus
Close Combat Weapons
, in

* Watanabe, Nathan
Hand Grenade
, in

* Storz, Dieter
Rifles
, in

* Cornish, Paul
Flamethrower
, in

* Storz, Dieter
Artillery
, in

* Cornish, Paul
Machine Gun
, in

{{DEFAULTSORT:Technology During World War I Military equipment of World War I Science and technology during World War I 20th century in science 20th century in technology