paragraph_text: The first VT tank, VT 1-1, was built in 1974 by Maschinenbau Kiel (MaK). One year later they produced the second VT tank, the VT 1-2. For further testing of the mobility and the concept of a tank with two main guns, five Gefechtsfeldversuchträger (GVT, "battlefield test-beds") were designed and built in 1975 and 1976.

paragraph_text: The Renault R40 or Char léger modèle 1935 R modifié 1939 was a French light infantry tank that was used early in World War II, an improvement of the Renault R35, of which it is often considered a variant.

paragraph_text: In Great Britain, an initial vehicle, nicknamed Little Willie, was constructed at William Foster & Co., during August and September 1915. The prototype of a new design that became the Mark I tank was demonstrated to the British Army on February 2 1916. Although initially termed ``Landships ''by the Landship Committee, production vehicles were named`` tanks'', to preserve secrecy. The term was chosen when it became known that the factory workers at William Foster referred to the first prototype as ``the tank ''because of its resemblance to a steel water tank.

paragraph_text: The Fiat L6/40 was a light tank used by the Italian army from 1940 through World War II. It was designed by Fiat-Ansaldo as an export product, and was adopted by the Italian Army when officials learned of the design and expressed interest. It was the main tank employed by the Italian forces fighting on the Eastern Front alongside the L6/40-based Semovente 47/32 self-propelled gun. L6/40s were also used in the North African campaign.

paragraph_text: The .55 Boys was adopted and manufactured alongside the Boys Anti-Tank Rifle in 1937 throughout the Commonwealth of Nations by firms such as Kynoch. However, when the United Kingdom entered World War II, the .55 Boys round was soon found to be insufficient against even early war Axis tanks in late 1939 and 1940. However, the United Kingdom had to rely on the .55 Boys round for several years because no better infantry anti-tank weapons were available. When the PIAT anti-tank weapon was introduced in 1943, the shaped charges it fired proved to be far more effective against enemy armor than the .55 Boys round had The Boys rifle was phased out of service as the PIAT became the British military's primary handheld anti-tank weapon. Despite its lack of effectiveness as an anti-tank weapon, the .55 Boys was used throughout World War II in both the Pacific and Atlantic theaters and also saw use during the Winter War and Continuation War by Finland. By the conclusion of World War II, the .55 Boys was no longer used in any major capacity.

paragraph_text: The ZB-53 was designed by Václav Holek and Miroslav Rolčík of the Zbrojovka Brno works as a replacement for the Schwarzlose machine gun of World War I origin. Based on the earlier vz. 35 machine gun, the prototype was tested in 1936 and the following year the new machine gun was adopted by the Czechoslovak Army with the designation TK vz. 37 ("Heavy Machine Gun Mark 1937"). It was introduced as the standard machine gun of Czechoslovak LT-35 and LT-38 tanks. Czechoslovakia exported the gun to Romania, Yugoslavia, Argentina, Afghanistan, Iran and China (large numbers used during the Second Sino-Japanese War), while UK bought a license and started to produce its own version, known as the Besa machine gun (over 60,000 pieces made). During the German occupation of the factory, large numbers were produced for the Waffen-SS until 1942.

paragraph_text: After the end of World War I, Renault FTs were exported to many countries (Belgium, Brazil, Czechoslovakia, Estonia, Finland, Iran, Japan, Lithuania, the Netherlands, Poland, Romania, Spain, Switzerland, Turkey, and Yugoslavia). Renault FT tanks were used by most nations having armoured forces, generally as their prominent tank type.

paragraph_text: The Fiat 3000 was the first tank to be produced in series in Italy. It became the standard tank of the emerging Italian armored units after World War I. The 3000 was based on the French Renault FT.

paragraph_text: The Automitrailleuse de Reconnaissance Renault Modèle 35 Type ZT (AMR 35 or Renault ZT) was a French light tank developed during the Interbellum and used in the Second World War. It was not intended to reconnoitre and report as its name suggests but was a light armoured combat vehicle, mostly without a radio and used as a support tank for the mechanised infantry.

paragraph_text: The M19 Tank Transporter (US supply catalog designation G159) was a heavy tank transporter system used in World War II and into the 1950s. It consisted of a 12-ton 6x4 M20 Diamond T Model 980 truck and companion 12-wheel M9 trailer.

paragraph_text: The Self Propelled 17pdr, Valentine, Mk I, Archer was a British self propelled anti-tank gun of the Second World War based on the Valentine infantry tank chassis fitted with an Ordnance QF 17 pounder gun. Designed and manufactured by Vickers-Armstrongs, 655 were produced between March 1943 and May 1945. It was used in North-West Europe and Italy during the war; post-war, it served with the Egyptian Army. This vehicle was unusual in that its gun faced the rear of the chassis instead of the front.

paragraph_text: The introduction of the guided missile resulted in a significant shift in anti-aircraft strategy. Although Germany had been desperate to introduce anti-aircraft missile systems, none became operational during World War II. Following several years of post-war development, however, these systems began to mature into viable weapons systems. The US started an upgrade of their defences using the Nike Ajax missile, and soon the larger anti-aircraft guns disappeared. The same thing occurred in the USSR after the introduction of their SA-2 Guideline systems.

paragraph_text: The Ordnance QF 20 pounder (known as 20 pounder, 20 pdr or simply 20-pr) was a British 84 mm (3.307 inch) tank gun. It was introduced in 1948 and used in the Centurion main battle tank, Charioteer medium tank, and Caernarvon Mark II heavy tank. The 20 pounder was designed to replace the effective Ordnance QF 17 pounder, which had proven itself in World War II. However, once the gun was found to have inadequate performance against the Soviet T-54, the gun was mostly replaced in service by the larger calibre 105 mm L7 gun.

paragraph_text: The Ampulomet (, also rendered "Ampulomyot", "ampulla mortar", etc., lit. "ampule/vial thrower" cf. миномёт) was an expedient anti-tank weapon which launched a 125 mm incendiary projectile made of spherical glass. This weapon was introduced in 1941 and used (to a limited degree) by the Red Army in World War II, but by 1942 was largely obsolete.

paragraph_text: The SA80 is a British family of 5.56 × 45mm NATO small arms, all of which are selective fire, gas - operated assault rifle s. The L85 rifle variant of the SA80 family has been the standard issue service rifle of the British Armed Forces since 1987, replacing the L1A1 variant of the FN FAL. The first prototypes were created in 1976, with production ending in 1994. The A1 variant was significantly upgraded in the early 2000s by Heckler & Koch as the SA80A2 and remains in service as of 2017. In mid-2016 a prototype A3 variant was showcased which further improved on the weapon and is reportedly being considered to extend the out of service date beyond 2025.

paragraph_text: The T-43 medium tank was a prototype Soviet medium tank developed during the Second World War as a possible replacement for both the T-34 medium and KV-1 heavy tanks. The project's aim was to build a medium tank with heavier armour, but German advances in tank technology proved better countered by a more heavily armed T-34-85 and the T-43 was cancelled.

paragraph_text: The development of tanks in World War I was a response to the stalemate that had developed on the Western Front. Although vehicles that incorporated the basic principles of the tank (armour, firepower, and all - terrain mobility) had been projected in the decade or so before the War, it was the alarmingly heavy casualties of the start of its trench warfare that stimulated development. Research took place in both Great Britain and France, with Germany only belatedly following the Allies' lead.

paragraph_text: The Panzer II was designed before the experience of the Spanish Civil War of 1936–39 showed that protection against armour-piercing shells was required for tanks to survive on a modern battlefield. Prior to that, armour was designed to stop machine gun fire and high-explosive shell fragments.

paragraph_text: The Infantry Tank Mark II, best known as the Matilda, was a British infantry tank of the Second World War.

paragraph_text: The RPG-43 (for "ruchnaya protivotankovaya granata obraztca 1943 goda" meaning "hand-held anti-tank grenade") was a high explosive anti-tank (HEAT) hand grenade used by the Soviet Union during the Second World War. It entered service in 1943, replacing the earlier models RPG-40 and RPG-41. The RPG-43 used a shaped charge HEAT warhead, whereas the RPG-40 used the simpler HE (high explosive) warhead. The RPG-43 had a penetration of around 75 mm of rolled homogeneous armour at a 90 degree angle. Later in the war, it was improved and became the RPG-6.

Question: When did the military which introduced the tank to the battlefields of WWI start using the SA80?
Answer: 1987