Infantry is a
military
A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. It is typically authorized and maintained by a sovereign state, with its members identifiable by their distin ...
specialization which engages in ground combat on foot. Infantry generally consists of
light infantry
Light infantry refers to certain types of lightly equipped infantry throughout history. They have a more mobile or fluid function than other types of infantry, such as heavy infantry or line infantry. Historically, light infantry often fought ...
,
mountain infantry,
motorized infantry
Motorized infantry is infantry that is transported by trucks or other motor vehicles. It is distinguished from mechanized infantry, which is carried in armoured personnel carriers or infantry fighting vehicles, and from light infantry, which ca ...
&
mechanized infantry
Mechanized infantry are infantry units equipped with armored personnel carriers (APCs) or infantry fighting vehicles (IFVs) for transport and combat (see also mechanized force).
As defined by the United States Army
The United States A ...
,
airborne infantry,
air assault infantry, and
marine infantry. Although disused in modern times,
heavy infantry
Heavy infantry consisted of heavily armed and armoured infantrymen who were trained to mount frontal assaults and/or anchor the defensive center of a battle line. This differentiated them from light infantry who are relatively mobile and lig ...
also commonly made up the bulk of many historic armies. Infantry,
cavalry, and
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 sieg ...
have traditionally made up the core of the
combat arms
Combat arms (or fighting arms in non-American parlance) are troops within national armed forces who participate in direct tactical ground combat. In general, they are units that carry or employ weapons, such as infantry, cavalry, and artillery ...
professions of various
armies, with the infantry almost always comprising the largest portion of these forces.
Etymology and terminology

In English, use of the term ''infantry'' began about the 1570s, describing
soldier
A soldier is a person who is a member of an army. A soldier can be a conscripted or volunteer enlisted person, a non-commissioned officer, or an officer.
Etymology
The word ''soldier'' derives from the Middle English word , from Old French ...
s who march and fight on foot. The word derives from
Middle French
Middle French (french: moyen français) is a historical division of the French language that covers the period from the 14th to the 16th century. It is a period of transition during which:
* the French language became clearly distinguished from t ...
''infanterie'', from older
Italian (also Spanish) ''infanteria'' (foot soldiers too inexperienced for cavalry), from
Latin
Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power ...
''
īnfāns'' (without speech, newborn, foolish), from which English also gets ''
infant
An infant or baby is the very young offspring of human beings. ''Infant'' (from the Latin word ''infans'', meaning 'unable to speak' or 'speechless') is a formal or specialised synonym for the common term ''baby''. The terms may also be used t ...
''. The individual-soldier term ''infantryman'' was not coined until 1837. In modern usage, foot soldiers of any era are now considered infantry and infantrymen.
From the mid-18th century until 1881 the
British Army
The British Army is the principal land warfare force of the United Kingdom, a part of the British Armed Forces along with the Royal Navy and the Royal Air Force. , the British Army comprises 79,380 regular full-time personnel, 4,090 Gur ...
named its infantry as numbered regiments "of Foot" to distinguish them from
cavalry and
dragoon regiments (see
List of Regiments of Foot).
Infantry equipped with special weapons were often named after that weapon, such as
grenadier
A grenadier ( , ; derived from the word ''grenade'') was originally a specialist soldier who threw hand grenades in battle. The distinct combat function of the grenadier was established in the mid-17th century, when grenadiers were recruited from ...
s for their
grenade
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 g ...
s, or
fusilier
Fusilier is a name given to various kinds of soldiers; its meaning depends on the historical context. While fusilier is derived from the 17th-century French word ''fusil'' – meaning a type of flintlock musket – the term has been used in con ...
s for their ''fusils''.These names can persist long after the weapon speciality; examples of infantry units that retained such names are the
Royal Irish Fusiliers and the
Grenadier Guards
"Shamed be whoever thinks ill of it."
, colors =
, colors_label =
, march = Slow: " Scipio"
, mascot =
, equipment =
, equipment ...
.
Dragoons were created as
mounted infantry
Mounted infantry were infantry
Infantry is a military specialization which engages in ground combat on foot. Infantry generally consists of light infantry, mountain infantry, motorized infantry & mechanized infantry, airborne infant ...
, with horses for travel between battles; they were still considered infantry since they dismounted before combat. However, if
light cavalry
Light cavalry comprised lightly armed and armored cavalry troops mounted on fast horses, as opposed to heavy cavalry, where the mounted riders (and sometimes the warhorses) were heavily armored. The purpose of light cavalry was primarily ...
was lacking in an army, any available dragoons might be assigned their duties; this practise increased over time, and dragoons eventually received all the weapons and training as both infantry and cavalry, and could be classified as both. Conversely, starting about the mid-19th century, regular cavalry have been forced to spend more of their time dismounted in combat due to the ever-increasing effectiveness of enemy infantry firearms. Thus most cavalry transitioned to mounted infantry. As with grenadiers, the ''dragoon'' and ''cavalry'' designations can be retained long after their horses, such as in the
Royal Dragoon Guards,
Royal Lancers, and
King's Royal Hussars.
Similarly,
motorised infantry have trucks and other unarmed vehicles for non-combat movement, but are still infantry since they leave their vehicles for any combat. Most modern infantry have vehicle transport, to the point where infantry being motorised is generally assumed, and the few exceptions might be identified as modern ''light infantry''.
Mechanised infantry go beyond motorised, having transport vehicles with combat abilities,
armoured personnel carrier
An armoured personnel carrier (APC) is a broad type of armoured military vehicle designed to transport personnel and equipment in combat zones. Since World War I, APCs have become a very common piece of military equipment around the world.
Acc ...
s (APCs), providing at least some options for combat without leaving their vehicles. In modern infantry, some APCs have evolved to be
infantry fighting vehicle
An infantry fighting vehicle (IFV), also known as a mechanized infantry combat vehicle (MICV), is a type of armoured fighting vehicle used to carry infantry into battle and provide direct-fire support. The 1990 Treaty on Conventional Armed For ...
s (IFVs), which are transport vehicles with more substantial combat abilities, approaching those of
light tanks. Some well-equipped mechanised infantry can be designated as ''armoured infantry''. Given that infantry forces typically also have some tanks, and given that most armoured forces have more mechanised infantry units than tank units in their organisation, the distinction between mechanised infantry and armour forces has blurred.
History
The first military forces in history were infantry. In
antiquity
Antiquity or Antiquities may refer to:
Historical objects or periods Artifacts
*Antiquities, objects or artifacts surviving from ancient cultures
Eras
Any period before the European Middle Ages (5th to 15th centuries) but still within the histo ...
, infantry were armed with early
melee weapon
A melee weapon, hand weapon or close combat weapon is any handheld weapon used in hand-to-hand combat, i.e. for use within the direct physical reach of the weapon itself, essentially functioning as an additional (and more impactful) extension of th ...
s such as a
spear
A spear is a pole weapon consisting of a shaft, usually of wood, with a pointed head. The head may be simply the sharpened end of the shaft itself, as is the case with fire hardened spears, or it may be made of a more durable material fasten ...
,
axe, or
sword
A sword is an edged, bladed weapon intended for manual cutting or thrusting. Its blade, longer than a knife or dagger, is attached to a hilt and can be straight or curved. A thrusting sword tends to have a straighter blade with a pointed t ...
, or an early
ranged weapon like a
javelin
A javelin is a light spear designed primarily to be thrown, historically as a ranged weapon, but today predominantly for sport. The javelin is almost always thrown by hand, unlike the sling, bow, and crossbow, which launch projectiles with t ...
,
sling
sling may refer to:
Places
*Sling, Anglesey, Wales
*Sling, Gloucestershire, England, a small village in the Forest of Dean
People with the name
* Otto Šling (1912–1952), repressed Czech communist functionary
Arts, entertainment, and media
* ...
, or
bow, with a few infantry men being expected to use both a melee and a ranged weapon. With the
development of gunpowder, infantry began converting to primarily
firearms. By the time of
Napoleonic warfare, infantry, cavalry and artillery formed a basic triad of ground forces, though infantry usually remained the most numerous. With
armoured 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 ...
,
armoured fighting vehicle
An armoured fighting vehicle (AFV) is an armed combat vehicle protected by armour, generally combining operational mobility with offensive and defensive capabilities. AFVs can be wheeled or tracked. Examples of AFVs are tanks, armoured ca ...
s have replaced the horses of cavalry, and
airpower
Airpower or air power consists of the application of military aviation, military strategy and strategic theory to the realm of aerial warfare and close air support. Airpower began in the advent of powered flight early in the 20th century. Airp ...
has added a new dimension to ground combat, but infantry remains pivotal to all modern
combined arms
Combined arms is an approach to warfare that seeks to integrate different combat arms of a military to achieve mutually complementary effects (for example by using infantry and armour in an urban environment in which each supports the other) ...
operations.

The first warriors, adopting
hunting weapons or improvised
melee weapon
A melee weapon, hand weapon or close combat weapon is any handheld weapon used in hand-to-hand combat, i.e. for use within the direct physical reach of the weapon itself, essentially functioning as an additional (and more impactful) extension of th ...
s,
before the existence of any organised military, likely started essentially as loose groups without any organisation or formation. But this changed sometime before
recorded history
Recorded history or written history describes the historical events that have been recorded in a written form or other documented communication which are subsequently evaluated by historians using the historical method. For broader world hi ...
; the first
ancient empires
An empire is a "political unit" made up of several territories and peoples, "usually created by conquest, and divided between a dominant center and subordinate peripheries". The center of the empire (sometimes referred to as the metropole) ex ...
(2500–1500 BC) are shown to have some soldiers with standardised military equipment, and the training and discipline required for battlefield formations and manoeuvres:
regular infantry. Though the main force of the army, these forces were usually kept small due to their cost of training and upkeep, and might be supplemented by local short-term mass-conscript forces using the older
irregular infantry
Irregular military is any non-standard military component that is distinct from a country's national armed forces. Being defined by exclusion, there is significant variance in what comes under the term. It can refer to the type of military orga ...
weapons and tactics; this remained a common practice almost up to modern times.
Before the adoption of the
chariot
A chariot is a type of cart driven by a charioteer, usually using horses to provide rapid motive power. The oldest known chariots have been found in burials of the Sintashta culture in modern-day Chelyabinsk Oblast, Russia, dated to c. 2000&nb ...
to create the first mobile fighting forces , all armies were pure infantry. Even after, with a few exceptions like the
Mongol Empire
The Mongol Empire of the 13th and 14th centuries was the largest contiguous land empire in history. Originating in present-day Mongolia in East Asia, the Mongol Empire at its height stretched from the Sea of Japan to parts of Eastern Europe ...
, infantry has been the largest component of most armies in history.
In the
Western world
The Western world, also known as the West, primarily refers to the various nations and states in the regions of Europe, North America, and Oceania. , from
Classical Antiquity
Classical antiquity (also the classical era, classical period or classical age) is the period of cultural history between the 8th century BC and the 5th century AD centred on the Mediterranean Sea, comprising the interlocking civilizations ...
through the
Middle Ages
In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire ...
( 8th century BC to 15th century AD), infantry are categorised as either
heavy infantry
Heavy infantry consisted of heavily armed and armoured infantrymen who were trained to mount frontal assaults and/or anchor the defensive center of a battle line. This differentiated them from light infantry who are relatively mobile and lig ...
or
light infantry
Light infantry refers to certain types of lightly equipped infantry throughout history. They have a more mobile or fluid function than other types of infantry, such as heavy infantry or line infantry. Historically, light infantry often fought ...
. Heavy infantry, such as Greek
hoplites, Macedonian
phalangites, and Roman
legionaries
The Roman legionary (in Latin ''legionarius'', plural ''legionarii'') was a professional heavy infantryman of the Roman army after the Marian reforms. These soldiers would conquer and defend the territories of ancient Rome during the late Repu ...
, specialised in
dense, solid formations driving into the main enemy lines, using weight of numbers to achieve a
decisive victory, and were usually equipped with heavier
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
armour
Armour (British English
British English (BrE, en-GB, or BE) is, according to Lexico, Oxford Dictionaries, "English language, English as used in Great Britain, as distinct from that used elsewhere". More narrowly, it can refer specificall ...
to fit their role. Light infantry, such as Greek
peltasts, Balearic
slingers, and Roman
velites, using open formations and greater manoeuvrability, took on most other combat roles:
scouting
Scouting, also known as the Scout Movement, is a worldwide youth Social movement, movement employing the Scout method, a program of informal education with an emphasis on practical outdoor activities, including camping, woodcraft, aquatics, hik ...
,
screening the army on the march,
skirmishing to delay, disrupt, or weaken the enemy to prepare for the main forces' battlefield attack, protecting them from
flanking manoeuvers, and then afterwards either pursuing the fleeing enemy or covering their army's retreat.
After the fall of Rome, the quality of heavy infantry declined, and warfare was dominated by
heavy cavalry
Heavy cavalry was a class of cavalry intended to deliver a battlefield charge and also to act as a tactical reserve; they are also often termed '' shock cavalry''. Although their equipment differed greatly depending on the region and histori ...
, such as
knight
A knight is a person granted an honorary title of knighthood by a head of state (including the Pope) or representative for service to the monarch, the church or the country, especially in a military capacity. Knighthood finds origins in the G ...
s, forming small elite units for decisive
shock combat
Shock tactics, shock tactic or shock attack is the name of an offensive maneuver which attempts to place the enemy under psychological pressure by a rapid and fully-committed advance with the aim of causing their combatants to retreat. The accep ...
, supported by peasant infantry
militia
A militia () is generally an army or some other fighting organization of non- professional soldiers, citizens of a country, or subjects of a state, who may perform military service during a time of need, as opposed to a professional force of r ...
s and assorted light infantry from the lower classes. Towards the end of Middle Ages, this began to change, where more professional and better trained light infantry could be effective against knights, such as the
English longbow
The English longbow was a powerful medieval type of bow, about long. While it is debated whether it originated in England or in Wales from the Welsh bow, by the 14th century the longbow was being used by both the English and the Welsh as ...
men in the
Hundred Years' War
The Hundred Years' War (; 1337–1453) was a series of armed conflicts between the kingdoms of England and France during the Late Middle Ages. It originated from disputed claims to the French throne between the English House of Plantag ...
. By the start of the
Renaissance
The Renaissance ( , ) , from , with the same meanings. is a period in European history marking the transition from the Middle Ages to modernity and covering the 15th and 16th centuries, characterized by an effort to revive and surpass id ...
, the infantry began to
return
Return may refer to:
In business, economics, and finance
* Return on investment (ROI), the financial gain after an expense.
* Rate of return, the financial term for the profit or loss derived from an investment
* Tax return, a blank document o ...
to a larger role, with
Swiss pikemen and German
Landsknechts filling the role of heavy infantry again, using
dense formations of pikes to drive off any cavalry.
Dense formations are vulnerable to ranged weapons. Technological developments allowed the raising of large numbers of light infantry units armed with ranged weapons, without the years of training expected for traditional high-skilled archers and slingers. This started slowly, first with
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 fir ...
men, then
hand cannon
The hand cannon ( Chinese: 手 銃 ''shŏuchòng'', or 火 銃 ''huŏchòng''), also known as the gonne or handgonne, is the first true firearm and the successor of the fire lance. It is the oldest type of small arms as well as the most mec ...
eers and
arquebus
An arquebus ( ) is a form of long gun that appeared in Europe and the Ottoman Empire during the 15th century. An infantryman armed with an arquebus is called an arquebusier.
Although the term ''arquebus'', derived from the Dutch word ''Haakbu ...
iers, each with increasing effectiveness, marking the beginning of
early modern warfare
Early modern warfare is the era of warfare following medieval warfare. It is associated with the start of the widespread use of gunpowder and the development of suitable weapons to use the explosive, including artillery and firearms; for th ...
, when
firearms rendered the use of heavy infantry obsolete. The introduction of
musketeer
A musketeer (french: mousquetaire) was a type of soldier equipped with a musket. Musketeers were an important part of early modern warfare particularly in Europe as they normally comprised the majority of their infantry. The musketeer was a pre ...
s using
bayonets in the mid 17th century began replacement of the pike with the
infantry square
An infantry square, also known as a hollow square, was a historic combat formation in which an infantry unit formed in close order, usually when it was threatened with cavalry attack. As a traditional infantry unit generally formed a line to adv ...
replacing the pike square.
To maximise their firepower, musketeer infantry were trained to fight in wide lines facing the enemy, creating
line infantry
Line infantry was the type of infantry that composed the basis of European land armies from the late 17th century to the mid-19th century. Maurice of Nassau and Gustavus Adolphus are generally regarded as its pioneers, while Turenne and Mo ...
. These fulfilled the central battlefield role of earlier heavy infantry, using ranged weapons instead of melee weapons. To support these lines, smaller infantry formations using dispersed
skirmish lines were created, called light infantry, fulfilling the same multiple roles as earlier light infantry. Their arms were no lighter than line infantry; they were distinguished by their skirmish formation and flexible tactics.
The modern
rifleman
A rifleman is an infantry soldier armed with a rifled long gun. Although the rifleman role had its origin with 16th century hand cannoneers and 17th century musketeers, the term originated in the 18th century with the introduction of the rif ...
infantry became the primary force for taking and holding ground on battlefields as a element of
combined arms
Combined arms is an approach to warfare that seeks to integrate different combat arms of a military to achieve mutually complementary effects (for example by using infantry and armour in an urban environment in which each supports the other) ...
. As firepower continued to increase, use of infantry lines diminished, until all infantry became light infantry in practice.
Modern classifications of infantry have expanded to reflect modern equipment and tactics, such as
motorised infantry,
mechanised or armoured infantry,
mountain infantry,
marine infantry, and
airborne infantry.
Equipment
Beyond main arms and armour, a infantryman's "military kit" generally includes
combat boot
Combat boots are military boots designed to be worn by soldiers during combat or combat training, as opposed to during parades and other ceremonial duties. Modern combat boots are designed to provide a combination of grip, ankle stability, and ...
s,
battledress
A combat uniform, also called field uniform, battledress or military fatigues, is a casual type of uniform used by military, police, fire and other public uniformed services for everyday fieldwork and combat duty purposes, as opposed to d ...
or combat
uniform
A uniform is a variety of clothing worn by members of an organization while participating in that organization's activity. Modern uniforms are most often worn by armed forces and paramilitary organizations such as police, emergency services, se ...
,
camping gear, heavy weather gear,
survival gear, secondary weapons and
ammunition
Ammunition (informally ammo) is the material fired, scattered, dropped, or detonated from any weapon or weapon system. Ammunition is both expendable weapons (e.g., bombs, missiles, grenades, land mines) and the component parts of other weapo ...
, weapon service and repair kits, health and hygiene items,
mess kit,
rations, filled
water canteen, and all other consumables each infantryman needs for the expected duration of time operating away from their unit's base, plus any special mission-specific equipment. One of the most valuable pieces of gear is the
entrenching tool—basically a folding
spade
A spade is a tool primarily for digging consisting of a long handle and blade, typically with the blade narrower and flatter than the common shovel. Early spades were made of riven wood or of animal bones (often shoulder blades). After the ...
—which can be employed not only to dig important defences, but also in a variety of other daily tasks, and even sometimes as a weapon. Infantry typically have shared equipment on top of this, like tents or heavy weapons, where the carrying burden is spread across several infantrymen. In all, this can reach for each soldier on the march. Such heavy infantry burdens have changed little over centuries of warfare; in the late Roman Republic, legionaries were nicknamed ''
Marius' mules'' as their main activity seemed to be carrying the weight of their legion around on their backs.
[Marius' reforms of the Roman army included making each man responsible for carrying his own supplies, weapons and several days' worth of ration. This made the legions less dependent on the baggage train and therefore more mobile.]
When combat is expected, infantry typically switch to "packing light", meaning reducing their equipment to weapons, ammo, and bare essentials, and leaving the rest with their transport or
baggage train, at camp or rally point, in temporary hidden caches, or even (in emergencies) discarding whatever may slow them down. Additional specialised equipment may be required, depending on the mission or to the particular terrain or environment, including
satchel charges,
demolition
Demolition (also known as razing, cartage, and wrecking) is the science and engineering in safely and efficiently tearing down of buildings and other artificial structures. Demolition contrasts with deconstruction, which involves taking a ...
tools,
mines,
barbed wire
A close-up view of a barbed wire
Roll of modern agricultural barbed wire
Barbed wire, also known as barb wire, is a type of steel fencing wire constructed with sharp edges or points arranged at intervals along the strands. Its primary use is ...
, carried by the infantry or attached specialists.
Historically, infantry have suffered high casualty rates from
disease
A disease is a particular abnormal condition that negatively affects the structure or function of all or part of an organism, and that is not immediately due to any external injury. Diseases are often known to be medical conditions that a ...
, exposure, exhaustion and privation — often in excess of the casualties suffered from enemy attacks. Better infantry equipment to support their health, energy, and protect from environmental factors greatly reduces these rates of loss, and increase their level of effective action. Health, energy, and morale are greatly influenced by how the soldier is fed, so militaries often standardised field rations, starting from
hardtack, to US
K-rations, to modern
MREs.
Communications gear has become a necessity, as it allows effective command of infantry units over greater distances, and communication with artillery and other support units. Modern infantry can have
GPS, encrypted individual communications equipment, surveillance and night vision equipment, advanced intelligence and other high-tech mission-unique aids.
Armies have sought to improve and standardise infantry gear to reduce fatigue for extended carrying, increase freedom of movement, accessibility, and compatibility with other carried gear, such as the US
All-purpose Lightweight Individual Carrying Equipment
The All-Purpose Lightweight Individual Carrying Equipment (ALICE) is a set of load-carrying equipment adopted as United States Army Standard A on 17 January 1973 to replace the M-1956 Individual Load-Carrying Equipment (ILCE) and M-1967 Mo ...
(ALICE).
Weapons
Infantrymen are defined by their primary arms – the
personal weapons and
body armour for their own individual use. The available technology, resources, history, and society can produce quite different weapons for each military and era, but common infantry weapons can be distinguished in a few basic categories.
*
Ranged combat weapons:
javelin
A javelin is a light spear designed primarily to be thrown, historically as a ranged weapon, but today predominantly for sport. The javelin is almost always thrown by hand, unlike the sling, bow, and crossbow, which launch projectiles with t ...
s, slings,
blowguns, bows,
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 fir ...
s, hand cannons,
arquebuses,
muskets
A musket is a muzzle-loaded long gun that appeared as a smoothbore weapon in the early 16th century, at first as a heavier variant of the arquebus, capable of penetrating plate armour. By the mid-16th century, this type of musket gradually di ...
,
grenades,
flamethrower
A flamethrower is a ranged incendiary device designed to project a controllable jet of fire. First deployed by the Byzantine Empire in the 7th century AD, flamethrowers saw use in modern times during World War I, and more widely in World Wa ...
s.
*
Close combat weapons: bludgeoning weapons like
clubs,
flails and
maces
Mace may refer to:
Spices
* Mace (spice), a spice derived from the aril of nutmeg
* '' Achillea ageratum'', known as English mace, a flowering plant once used as a herb
Weapons
* Mace (bludgeon), a weapon with a heavy head on a solid shaft used ...
;
bladed weapons
An edged weapon, or bladed weapon, is a melee weapon with a cutting edge. Bladed weapons include swords, daggers, knives, and bayonets. Edged weapons are used to cut, hack, or slash; some edged weapons (such as many kinds of swords) may also permit ...
like swords,
dagger
A dagger is a fighting knife with a very sharp point and usually two sharp edges, typically designed or capable of being used as a thrusting or stabbing weapon.State v. Martin, 633 S.W.2d 80 (Mo. 1982): This is the dictionary or popular-use de ...
s, and
axes;
pole weapons
A polearm or pole weapon is a close combat weapon in which the main fighting part of the weapon is fitted to the end of a long shaft, typically of wood, thereby extending the user's effective range and striking power. Polearms are predominant ...
like spears, halberds,
naginata
The ''naginata'' (, ) is a pole weapon and one of several varieties of traditionally made Japanese blades ('' nihontō''). ''Naginata'' were originally used by the samurai class of feudal Japan, as well as by ashigaru (foot soldiers) and sōhei ...
, and pikes.
*
Both ranged and close weapons: the bayonet fixed to a firearm allows infantrymen to use the same weapon for both ranged combat and close combat. This started with muskets and continued with
rifles to
automatic firearms.
Use of the bayonet has declined with modern automatic firearms, but still generally kept as a weapon of last resort.
Infantrymen often carry secondary or back-up weapons, sometimes called a
sidearm or
ancillary weapons. Infantry with ranged or pole weapons often carried a sword or dagger for possible hand-to-hand combat.
The ''
pilum
The ''pilum'' (; plural ''pila'') was a javelin commonly used by the Roman army in ancient times. It was generally about long overall, consisting of an iron shank about in diameter and long with a pyramidal head, attached to a wooden shaft b ...
'' was a javelin the Roman legionaries threw just before drawing their primary weapon, the ''
gladius
''Gladius'' () is a Latin word meaning "sword" (of any type), but in its narrow sense it refers to the sword of ancient Roman foot soldiers. Early ancient Roman swords were similar to those of the Greeks, called '' xiphe'' (plural; singular ''xi ...
'' (short sword), and closing with the enemy line.
Modern infantrymen now treat the bayonet as a backup weapon, but may also have
handgun
A handgun is a short- barrelled gun, typically a firearm, that is designed to be usable with only one hand. It is distinguished from a long gun (i.e. rifle, shotgun or machine gun, etc.), which needs to be held by both hands and also brac ...
s or
pistol
A pistol is a handgun, more specifically one with the chamber integral to its gun barrel, though in common usage the two terms are often used interchangeably. The English word was introduced in , when early handguns were produced in Europe, ...
s. They may also deploy anti-personnel mines, booby traps, incendiary or explosive devices defensively before combat.
Protection
Infantry have employed many different methods of protection from enemy attacks, including various kinds of armour and other gear, and tactical procedures.
The most basic is
personal armour. This includes
shield
A shield is a piece of personal armour held in the hand, which may or may not be strapped to the wrist or forearm. Shields are used to intercept specific attacks, whether from close-ranged weaponry or projectiles such as arrows, by means of ...
s,
helmets
A helmet is a form of protective gear worn to protect the head. More specifically, a helmet complements the skull in protecting the human brain. Ceremonial or symbolic helmets (e.g., a policeman's helmet in the United Kingdom) without prote ...
and many types of armour –
padded linen, leather,
lamellar
A ''lamella'' (plural ''lamellae'') is a small plate or flake, from the Latin, and may also be used to refer to collections of fine sheets of material held adjacent to one another, in a gill-shaped structure, often with fluid in between though s ...
,
mail
The mail or post is a system for physically transporting postcards, letter (message), letters, and parcel (package), parcels. A postal service can be private or public, though many governments place restrictions on private systems. Since the mid ...
,
plate, and
kevlar
Kevlar (para-aramid) is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965, the high-strength material was first used commercially in the early 1970s ...
. Initially, armour was used to defend both from ranged and close combat; even a fairly light shield could help defend against most slings and javelins, though high-strength bows and crossbows might penetrate common armour at very close range. Infantry armour had to compromise between protection and coverage, as a full suit of attack-proof armour would be too heavy to wear in combat.
As firearms improved, armour for ranged defence had to be thicker and stronger. With the introduction of the heavy arquebus designed to pierce standard steel armour, it was proven easier to make heavier firearms than heavier armour; armour transitioned to be only for close combat purposes. Pikemen armour tended to be just steel helmets and breastplates, and gunners little or no armour. By the time of the musket, the dominance of firepower shifted militaries away from any close combat, and use of armour decreased, until infantry typically went without any armour.
Helmets were added back during World War I as artillery began to dominate the battlefield, to protect against their
fragmentation
Fragmentation or fragmented may refer to:
Computers
* Fragmentation (computing), a phenomenon of computer storage
* File system fragmentation, the tendency of a file system to lay out the contents of files non-continuously
* Fragmented distributi ...
and other blast effects beyond a direct hit. Modern developments in bullet-proof composite materials like kevlar have started a return to body armour for infantry, though the extra weight is a notable burden.
In modern times, infantrymen must also often carry protective measures against
chemical
A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., wit ...
and
biological
Biology is the scientific study of life. It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field. For instance, all organisms are made up of cells that process hereditary ...
attack, including
military gas mask
A gas mask is a mask used to protect the wearer from inhaling airborne pollutants and toxic gases. The mask forms a sealed cover over the nose and mouth, but may also cover the eyes and other vulnerable soft tissues of the face. Most gas mask ...
s, counter-agents, and protective suits. All of these protective measures add to the weight an infantryman must carry, and may decrease combat efficiency.
Infantry-served weapons
Early crew-served weapons were
siege weapons, like the
ballista
The ballista (Latin, from Greek βαλλίστρα ''ballistra'' and that from βάλλω ''ballō'', "throw"), plural ballistae, sometimes called bolt thrower, was an ancient missile weapon that launched either bolts or stones at a distant ...
,
trebuchet
A trebuchet (french: trébuchet) is a type of catapult that uses a long arm to throw a projectile. It was a common powerful siege engine until the advent of gunpowder. The design of a trebuchet allows it to launch projectiles of greater weig ...
, and
battering ram
A battering ram is a siege engine that originated in ancient times and was designed to break open the masonry walls of fortifications or splinter their wooden gates. In its simplest form, a battering ram is just a large, heavy log carried ...
. Modern versions include
machine guns,
anti-tank missiles, and infantry
mortars.
Formations

Beginning with the development the first regular military forces, close-combat regular infantry fought less as unorganised groups of individuals and more in coordinated units, maintaining a defined
tactical formation
Element: A group of soldiers
A tactical formation (or order) is the arrangement or deployment of moving military forces such as infantry, cavalry, AFVs, military aircraft, or naval vessels. Formations were found in tribal societies such as th ...
during combat, for increased battlefield effectiveness; such infantry formations and the arms they used developed together, starting with the spear and the shield.
A spear has decent attack abilities with the additional advantage keeping opponents at distance; this advantage can be increased by using longer spears, but this could allow the opponent to side-step the point of the spear and close for
hand-to-hand combat
Hand-to-hand combat (sometimes abbreviated as HTH or H2H) is a physical confrontation between two or more persons at short range ( grappling distance or within the physical reach of a handheld weapon) that does not involve the use of weapons.Hu ...
where the longer spear is near useless. This can be avoided when each spearman stays side by side with the others in close formation, each covering the ones next to him, presenting a solid wall of spears to the enemy that they cannot get around.
Similarly, a shield has decent defence abilities, but is literally hit-or-miss; an attack from an unexpected angle can bypass it completely. Larger shields can cover more, but are also heavier and less manoeuvrable, making unexpected attacks even more of a problem. This can be avoided by having shield-armed soldiers stand close together, side-by-side, each protecting both themselves and their immediate comrades, presenting a solid
shield wall to the enemy.

The opponents for these first formations, the close-combat infantry of more
tribal societies, or any military without regular infantry (so called "
barbarian
A barbarian (or savage) is someone who is perceived to be either uncivilized or primitive. The designation is usually applied as a generalization based on a popular stereotype; barbarians can be members of any nation judged by some to be less ...
s") used arms that focused on the individual – weapons using personal strength and force, such as larger swinging swords, axes, and clubs. These take more room and individual freedom to swing and wield, necessitating a more loose organisation. While this may allow for a fierce running attack (an initial shock advantage) the tighter formation of the heavy spear and shield infantry gave them a local manpower advantage where several might be able to fight each opponent.
Thus tight formations heightened advantages of heavy arms, and gave greater local numbers in melee. To also increase their staying power, multiple rows of heavy infantrymen were added. This also increased their shock combat effect; individual opponents saw themselves literally lined-up against several heavy infantryman each, with seemingly no chance of defeating all of them. ''Heavy infantry'' developed into huge solid block formations, up to a hundred meters wide and a dozen rows deep.
Maintaining the advantages of heavy infantry meant maintaining formation; this became even more important when two forces with heavy infantry met in battle; the solidity of the formation became the deciding factor. Intense discipline and training became paramount. Empires formed around their military.
Organization
The organization of military forces into regular military units is first noted in Egyptian records of the
Battle of Kadesh
The Battle of Kadesh or Battle of Qadesh took place between the forces of the New Kingdom of Egypt under Ramesses II and the Hittite Empire under Muwatalli II at the city of Kadesh on the Orontes River, just upstream of Lake Homs near the ...
(). Soldiers were grouped into units of 50, which were in turn grouped into larger units of 250, then 1,000, and finally into units of up to 5,000 – the largest independent command. Several of these Egyptian "divisions" made up an army, but operated independently, both on the march and tactically, demonstrating sufficient military
command and control
Command and control (abbr. C2) is a "set of organizational and technical attributes and processes ... hatemploys human, physical, and information resources to solve problems and accomplish missions" to achieve the goals of an organization or e ...
organisation for basic battlefield manoeuvres. Similar hierarchical organizations have been noted in other ancient armies, typically with approximately 10 to 100 to 1,000 ratios (even where
base 10
The decimal numeral system (also called the base-ten positional numeral system and denary or decanary) is the standard system for denoting integer and non-integer numbers. It is the extension to non-integer numbers of the Hindu–Arabic numeral ...
was not common), similar to modern
sections (squads),
companies
A company, abbreviated as co., is a legal entity representing an association of people, whether natural, legal or a mixture of both, with a specific objective. Company members share a common purpose and unite to achieve specific, declared ...
, and
regiment
A regiment is a military unit. Its role and size varies markedly, depending on the country, service and/or a specialisation.
In Medieval Europe, the term "regiment" denoted any large body of front-line soldiers, recruited or conscripted ...
s.
Training

The training of the infantry has differed drastically over time and from place to place. The cost of maintaining an army in fighting order and the seasonal nature of warfare precluded large permanent armies.
The antiquity saw everything from the well-trained and motivated citizen armies of Greece and Rome, the tribal host assembled from farmers and hunters with only passing acquaintance with warfare and masses of lightly armed and ill-trained militia put up as a last ditch effort.
Kushite king
Taharqa
Taharqa, also spelled Taharka or Taharqo ( Egyptian: 𓇿𓉔𓃭𓈎 ''tꜣ-h-rw-k'', Akkadian: ''Tar-qu-u2'', , Manetho's ''Tarakos'', Strabo's ''Tearco''), was a pharaoh of the Twenty-fifth Dynasty of Egypt and qore (king) of the Kingdom ...
enjoyed military success in the
Near East as a result of his efforts to strengthen the army through daily training in long distance running.
In medieval times the foot soldiers varied from peasant levies to semi-permanent companies of mercenaries, foremost among them the Swiss, English,
Aragon
Aragon ( , ; Spanish and an, Aragón ; ca, Aragó ) is an autonomous community in Spain, coextensive with the medieval Kingdom of Aragon. In northeastern Spain, the Aragonese autonomous community comprises three provinces (from north to so ...
ese and German, to men-at-arms who went into battle as well-armoured as knights, the latter of which at times also fought on foot.
The creation of
standing armies—permanently assembled for war or defence—saw increase in training and experience. The increased use of firearms and the need for drill to handle them efficiently.
The introduction of national and mass armies saw an establishment of minimum requirements and the introduction of special troops (first of them the engineers going back to medieval times, but also different kinds of infantry adopted to specific terrain, bicycle, motorcycle, motorised and mechanised troops) culminating with the introduction of highly trained special forces during the first and second World War.
Air force and naval infantry
Naval infantry, commonly known as
marines
Marines, or naval infantry, are typically a military force trained to operate in littoral zones in support of naval operations. Historically, tasks undertaken by marines have included helping maintain discipline and order aboard the ship (ref ...
, are primarily a category of infantry that form part of the naval forces of states and perform roles on land and at sea, including
amphibious operations, as well as other, naval roles. They also perform other tasks, including land warfare, separate from naval operations.
Air force infantry and base defense forces, such as the
Royal Air Force Regiment
The Royal Air Force Regiment (RAF Regiment) is part of the Royal Air Force and functions as a specialist corps. Founded by royal warrant in 1942, the Corps carries out soldiering tasks relating to the delivery of air power. Examples of such tas ...
,
Royal Australian Air Force Airfield Defence Guards, and
Indonesian Air Force Paskhas Corps are used primarily for ground-based defense of air bases and other air force facilities. They also have a number of other, specialist roles. These include, among others,
Chemical, Biological, Radiological and Nuclear (CBRN) defence and training other airmen in basic ground defense tactics.
See also
*
Air assault
Air assault is the movement of ground-based military forces by vertical take-off and landing (VTOL) aircraft—such as the helicopter—to seize and hold key terrain which has not been fully secured, and to directly engage enemy forces behind ...
*
Combined arms
Combined arms is an approach to warfare that seeks to integrate different combat arms of a military to achieve mutually complementary effects (for example by using infantry and armour in an urban environment in which each supports the other) ...
*
Foot guards
*
Fusilier
Fusilier is a name given to various kinds of soldiers; its meaning depends on the historical context. While fusilier is derived from the 17th-century French word ''fusil'' – meaning a type of flintlock musket – the term has been used in con ...
s
*
Glider infantry
Glider infantry (also referred to as airlanding infantry esp. in British usage) was a type of airborne infantry in which soldiers and their equipment were inserted into enemy-controlled territory via military glider. Initially developed in the ...
/
Paratrooper
A paratrooper is a military parachutist—someone trained to parachute into a military operation, and usually functioning as part of an airborne force. Military parachutists (troops) and parachutes were first used on a large scale during Wor ...
*
Grenadier
A grenadier ( , ; derived from the word ''grenade'') was originally a specialist soldier who threw hand grenades in battle. The distinct combat function of the grenadier was established in the mid-17th century, when grenadiers were recruited from ...
s
*
Indonesian Army infantry battalions
*
Infantry Branch (United States)
*
Infantry of the British Army
*
Infantry tactics
*
Line infantry
Line infantry was the type of infantry that composed the basis of European land armies from the late 17th century to the mid-19th century. Maurice of Nassau and Gustavus Adolphus are generally regarded as its pioneers, while Turenne and Mo ...
*
Marines
Marines, or naval infantry, are typically a military force trained to operate in littoral zones in support of naval operations. Historically, tasks undertaken by marines have included helping maintain discipline and order aboard the ship (ref ...
*
United States Army Rangers
United States Army Rangers, according to the US Army's definition, are personnel, past or present, in any unit that has the official designation "Ranger". The term is commonly used to include graduates of the US Army Ranger School, even if t ...
*
Riflemen
*
Royal Canadian Infantry Corps
The Royal Canadian Infantry Corps (french: Corps d'infanterie royal canadien) is the infantry corps of the Canadian Army and includes regular and reserve force regiments.
Originally formed as the Canadian Infantry Corps on 2 September 1942 to en ...
*
School of Infantry
*
Special forces
Special forces and special operations forces (SOF) are military units trained to conduct special operations. NATO has defined special operations as "military activities conducted by specially designated, organized, selected, trained and equip ...
*
Pathfinder (military)
In military organizations, a pathfinder is a specialized soldier inserted or dropped into place in order to set up and operate drop zones, pickup zones, and helicopter landing sites for airborne operations, air resupply operations, or othe ...
Notes
References
Citations
Sources
* English, John A., Gudmundsson, Bruce I., ''On Infantry'', (Revised edition), The Military Profession series, Praeger Publishers, London, 1994. .
* ''The Times'', Earl Wavell, Thursday, 19 April 194
In Praise of Infantry
* Tobin, James, ''Ernie Pyle's War: America's Eyewitness to World War II'', Free Press, 1997.
* Mauldin, Bill, Ambrose, Stephen E., ''Up Front'', W. W. Norton, 2000.
* Trogdon, Robert W., ''Ernest Hemingway: A Literary Reference'', Da Capo Press, 2002.
* ''The New York Times'', Maj Gen C T Shortis, British Director of Infantry, 4 February 1985.
* Heinl, Robert Debs, ''Dictionary of Military and Naval Quotations'', Plautus in ''The Braggart Captain'' (3rd century AD), Naval Institute Press, Annapolis, 1978.
* Nafziger, George, ''Napoleon's Invasion of Russia'', Presidio Press, 1998.
* McManus, John C. ''Grunts: inside the American infantry combat experience, World War II through Iraq'' New York, NY: NAL Caliber. 2010 plu
Webcast Author Lectureat the
Pritzker Military Library on 29 September 2010.
External links
* Historic films and photos showing Infantries in World War I a
europeanfilmgateway.eu by Field-Marshal Earl Wavell; First published in "The Times," Thursday, 19 April 1945.
KFOR: KFOR Chronicle.
Web Version of U.S. Army Field Manual 3–21.8– The Infantry Rifle Platoon and Squad.
* — includes several drawings
{{Authority control
Combat occupations