In military terminology, a rocket is a self-propelled, generally unguided,

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 ...

-system powered by a

rocket engine A rocket engine uses stored rocket propellants as the reaction mass for forming a high-speed propulsive jet of fluid, usually high-temperature gas. Rocket engines are reaction engines, producing thrust by ejecting mass rearward, in accorda ...

. Though used primarily as medium- and long-range

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 ...

systems, historically rockets have also seen considerable use as air-to-surface weapons, some use as air-to-air weapons, and even (in a few cases) as surface-to-air devices. Examples of modern surface-to-surface rocket systems include the Soviet

BM-27 Uragan The BM-27 Uragan (russian: БМ-27 Ураган, lit=Hurricane; GRAU index 9P140) is a self-propelled 220 mm multiple rocket launcher designed in the Soviet Union. The system began its service with the Soviet Army in the late 1970s, and wa ...

and the American M270 Multiple Launch Rocket System. In military parlance, a rocket differs from a

missile In military terminology, a missile is a guided airborne ranged weapon capable of self-propelled flight usually by a jet engine or rocket motor. Missiles are thus also called guided missiles or guided rockets (when a previously unguided rocke ...

primarily by lacking an active guidance system; early missiles became known as "guided rockets" or "guided missiles". Some rockets were developed as unguided systems and later upgraded to guided versions, like the

GMLRS The M270 Multiple Launch Rocket System (M270 MLRS) is an American-developed armored, self-propelled, multiple rocket launcher. The U.S. Army variant of the MLRS vehicle is based on the chassis of the Bradley Fighting Vehicle. The first M270s wer ...

, and these generally retain the term "rocket" instead of becoming "missiles". Rockets or missiles that travel underwater, like the

VA-111 Shkval The VA-111 ''Shkval'' (from russian: шквал, ''squall'') torpedo and its descendants are supercavitating torpedoes originally developed by the Soviet Union. They are capable of speeds in excess of 200 knots (370 km/h or 230 miles/h). ...

, are known as "

torpedoes A modern torpedo is an underwater ranged weapon launched above or below the water surface, self-propelled towards a target, and with an explosive warhead designed to detonate either on contact with or in proximity to the target. Historically, su ...

", whatever their propulsion system.

Early development

The use of rockets as some form of

dates back to

medieval 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, post-classical period of World history (field), global history. It began with t ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...

where devices such as fire arrows were used (albeit mostly as a psychological weapon), and gradually spread to

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...

and the

Middle East The Middle East ( ar, الشرق الأوسط, ISO 233: ) is a geopolitical region commonly encompassing Arabian Peninsula, Arabia (including the Arabian Peninsula and Bahrain), Anatolia, Asia Minor (Asian part of Turkey except Hatay Pro ...

. Rockets became a significant weapon during the 20th century, when precise manufacturing processes made relatively accurate rockets possible.

Basic roles

Artillery

Rockets have been used as an artillery weapon for centuries, and continue to be used in the modern age after being extensively modernized in

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 opposin ...

. Rockets in the artillery role complement traditional

field guns A field gun is a field artillery piece. Originally the term referred to smaller guns that could accompany a field army on the march, that when in combat could be moved about the battlefield in response to changing circumstances ( field artille ...

, being superior in some ways and inferior in others. Rocket artillery tends to be simpler, lighter and more mobile than guns or howitzers, most of which must be emplaced. Guns tend to have better accuracy, consistency, and range, while rocket artillery is light enough to be employed closer to the front lines and excels at saturation fire, expending its entire ammunition load in a single barrage on a target. The

saturation fire Saturation fire is a saturation attack using an intense level of artillery bombardment or rapid direct fire (from automatic weapons such as machine guns, autocannons or rotary guns) that is designed to overwhelm a target area with lethal firepowe ...

produced by rocket artillery is only somewhat approximated in effectiveness with gun artillery via the

time on target 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 ...

barrage method. Time-sensitive soft target interdiction (such as personnel or unarmored vehicles moving in large groups) is where rocket artillery is particularly useful. This allows for the

shoot-and-scoot Shoot-and-scoot (alternatively, fire-and-displace or fire-and-move) is an artillery tactic of firing at a target and then immediately moving away from the location from where the shots were fired to avoid counter-battery fire (e.g. from enemy a ...

method, avoiding the enemy

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 ...

that is the greatest risk to emplaced artillery pieces, while maximizing damage to the target before it can find better cover. (see Rocket artillery vs gun artillery) Panzerfaust3

Portable anti-tank

With the invention 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 engin ...

, the

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 infantry, air assault infantry, and marine i ...

required a weapon to counter the threat. Tank armour soon developed beyond the point at which an

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 ...

could practically be carried by an infantryman, and by the

Second World War 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 opposin ...

rocket weapons such as the US

bazooka Bazooka () is the common name for a man-portable recoilless anti-tank rocket launcher weapon, widely deployed by the United States Army, especially during World War II. Also referred to as the "stovepipe", the innovative bazooka was among the ...

and

German 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 ...

Panzerschreck ''Panzerschreck'' (lit. "tank fright", "tank's fright" or "tank's bane") was the popular name for the ''Raketenpanzerbüchse'' 54 ("Rocket Anti-armor Rifle Model 54", abbreviated to RPzB 54), an 88 mm reusable anti-tank rocket launcher dev ...

were in service. Development continued after the war, with weapons such as the

RPG-7 The RPG-7 (russian: link=no, РПГ-7, Ручной Противотанковый Гранатомёт, Ruchnoy Protivotankoviy Granatomyot) is a portable, reusable, unguided, shoulder-launched, anti-tank, rocket-propelled grenade launcher. ...

, although a need to increase range led to the development of guided weapons to fulfill the anti-tank role. Most modern armies now use guided missiles for long-range engagements and rockets for close-range or emergency use; disposable weapons such as the

RPG-26 The RPG-26 ''Aglen'' is a disposable anti-tank rocket launcher developed by the Soviet Union. It fires a single-stage rocket with jack-knife fins, which unfold after launch. The rocket carries a diameter high explosive anti-tank single shaped ...

are popular for this. The use of anti-tank weapons to attack buildings and other targets has led to the development of weapons and ammunition designed specifically to attack non-tank targets, such as the one-shot LASM and the larger SMAW.

Air-launched

Unguided rockets are a widely used weapon system and have been launched from

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 engines ...

since the early 20th century, to attack land, sea and air targets. Even after the development of guided missiles, rockets remain useful for short-range attacks – typically for

close air support In military tactics, close air support (CAS) is defined as air action such as air strikes by fixed or rotary-winged aircraft against hostile targets near friendly forces and require detailed integration of each air mission with fire and moveme ...

missions. The standard NATO calibre is 70mm and is considered as the international calibre. The rockets can be fired from a variety of rotary and fixed-wing platforms and combat aircraft of many nations worldwide by means of a rocket launcher. The 70mm rocket system offers several warhead configurations that fulfill a wide range of special mission requirements to defeat soft to lightly armored targets.

References