Question: In what year did the conflict which involved JP233 begin?

full_context: Document 1: Airport: Hazards to aircraft include debris, nesting birds, and reduced friction levels due to environmental conditions such as ice, snow, or rain. Part of runway maintenance is airfield rubber removal which helps maintain friction levels. The fields must be kept clear of debris using cleaning equipment so that loose material does not become a projectile and enter an engine duct (see foreign object damage). In adverse weather conditions, ice and snow clearing equipment can be used to improve traction on the landing strip. For waiting aircraft, equipment is used to spray special deicing fluids on the wings.
Document 2: Gulf War: The war is also known under other names, such as the Persian Gulf War, First Gulf War, Gulf War I, Kuwait War, First Iraq War or Iraq War, before the term ``Iraq War ''became identified instead with the 2003 Iraq War (also referred to in the US as`` Operation Iraqi Freedom''). The Iraqi Army's occupation of Kuwait that began 2 August 1990 was met with international condemnation and brought immediate economic sanctions against Iraq by members of the UN Security Council. US President George H.W. Bush deployed US forces into Saudi Arabia, and urged other countries to send their own forces to the scene. An array of nations joined the coalition, the largest military alliance since World War II. The great majority of the coalition's military forces were from the US, with Saudi Arabia, the United Kingdom and Egypt as leading contributors, in that order. Kuwait and Saudi Arabia paid around US $32 billion of the US $60 billion cost.
Document 3: The Blitz: Y-Gerät was the most complex system of the three. It was, in effect, an automatic beam-tracking system, operated through the bomber's autopilot. The single approach beam along which the bomber tracked was monitored by a ground controller. The signals from the station were retransmitted by the bomber's equipment. This way the distance the bomber travelled along the beam could be precisely verified. Direction-finding checks also enabled the controller to keep the crew on an exact course. The crew would be ordered to drop their bombs either by issue of a code word by the ground controller, or at the conclusion of the signal transmissions which would stop. Although its maximum usable range was similar to the previous systems, it was not unknown for specific buildings to be hit.
Document 4: Jameel Sayhood: Jameel Sayhood was an Iraqi pilot in the Gulf War who it is claimed managed to attain one of the few aerial victories by the Iraqi Air Force in his MiG-29B, before being shot down by USAF Captain Craig Underhill and Captain Cesar Rodriguez with their F-15Cs mere minutes after his air-air victory.
Document 5: War on Terror: Following the ceasefire agreement that suspended hostilities (but not officially ended) in the 1991 Gulf War, the United States and its allies instituted and began patrolling Iraqi no-fly zones, to protect Iraq's Kurdish and Shi'a Arab population—both of which suffered attacks from the Hussein regime before and after the Gulf War—in Iraq's northern and southern regions, respectively. U.S. forces continued in combat zone deployments through November 1995 and launched Operation Desert Fox against Iraq in 1998 after it failed to meet U.S. demands of "unconditional cooperation" in weapons inspections.
Document 6: The Blitz: In 1936, Wever was killed in an air crash. The failure to implement his vision for the new Luftwaffe was largely attributable to his immediate successors. Ex-Army personnel Albert Kesselring and Hans-Jürgen Stumpff are usually blamed for the turning away from strategic planning and focusing on close air support. However, it would seem the two most prominent enthusiasts for the focus on ground-support operations (direct or indirect) were actually Hugo Sperrle and Hans Jeschonnek. These men were long-time professional airmen involved in German air services since early in their careers. The Luftwaffe was not pressured into ground support operations because of pressure from the army, or because it was led by ex-army personnel. It was instead a mission that suited the Luftwaffe's existing approach to warfare; a culture of joint inter-service operations, rather than independent strategic air campaigns.
Document 7: Gulf War: The Gulf War (2 August 1990 -- 28 February 1991), codenamed Operation Desert Shield (2 August 1990 -- 17 January 1991) for operations leading to the buildup of troops and defense of Saudi Arabia and Operation Desert Storm (17 January 1991 -- 28 February 1991) in its combat phase, was a war waged by coalition forces from 35 nations led by the United States against Iraq in response to Iraq's invasion and annexation of Kuwait.
Document 8: Gulf War: The war is also known under other names, such as the Persian Gulf War, First Gulf War, Gulf War I, Kuwait War, First Iraq War or Iraq War, before the term ``Iraq War ''became identified instead with the 2003 Iraq War (also referred to in the US as`` Operation Iraqi Freedom''). The Iraqi Army's occupation of Kuwait that began 2 August 1990 was met with international condemnation and brought immediate economic sanctions against Iraq by members of the UN Security Council. Together with the UK's prime minister Margaret Thatcher (who had fiercely resisted the invasion by Argentina of the Falkland Islands a decade earlier), George Bush deployed US forces into Saudi Arabia, and urged other countries to send their own forces to the scene. An array of nations joined the coalition, forming the largest military alliance since World War II. The great majority of the coalition's military forces were from the US, with Saudi Arabia, the United Kingdom and Egypt as leading contributors, in that order. Kuwait and Saudi Arabia paid around US $32 billion of the US $60 billion cost.
Document 9: JP233: Deployment was rather frightening for the flight crew, since it required the aircraft to fly low, straight and level over an enemy airfield, and when over the runway the pods would dispense their payload. During the Gulf War it was widely reported in the popular press that Tornados were shot down by AAA fire and MANPADS during delivery of the JP233 munition, but in fact none of the losses occurred during the attack phase of a JP233 mission. Only one aircraft was lost carrying the JP233 munition when Tornado "ZA392" crashed into the ground approximately after delivering the weapon at low level; enemy fire was not reported and it was believed that this was an incident of controlled flight into terrain.
Document 10: Argus Fernfeuer: Arising from the Argus As 292 project, the Argus Fernfeuer was also designed by Fritz Gosslau. During the testing of the small As 292 drone, Gosslau proposed an aircraft-sized UAV capable of delivering a one tonne drop charge over long distances. Control was either by line-of-sight radio control or by radio beam direction. A manned aircraft, flying clear of local defenses, would signal the UAV to release the drop-load. The Fernfeuer aircraft would then return to base.
Document 11: Anti-aircraft warfare: As aircraft started to be used against ground targets on the battlefield, the AA guns could not be traversed quickly enough at close targets and, being relatively few, were not always in the right place (and were often unpopular with other troops), so changed positions frequently. Soon the forces were adding various machine-gun based weapons mounted on poles. These short-range weapons proved more deadly, and the "Red Baron" is believed to have been shot down by an anti-aircraft Vickers machine gun. When the war ended, it was clear that the increasing capabilities of aircraft would require better means of acquiring targets and aiming at them. Nevertheless, a pattern had been set: anti-aircraft weapons would be based around heavy weapons attacking high-altitude targets and lighter weapons for use when they came to lower altitudes.
Document 12: Invasion of Kuwait: The Invasion of Kuwait on 2 August 1990 was a two - day operation conducted by Iraq against the neighboring state of Kuwait, which resulted in the seven - month - long Iraqi occupation of the country. This invasion and Iraq's subsequent refusal to withdraw from Kuwait by a deadline mandated by the United Nations led to military intervention by a United Nations - authorized coalition of forces led by the United States. These events came to be known as the first Gulf War and resulted in the expulsion of Iraqi forces from Kuwait and the Iraqis setting 600 Kuwaiti oil wells on fire during their retreat.
Document 13: United States Army: By 1989 Germany was nearing reunification and the Cold War was coming to a close. Army leadership reacted by starting to plan for a reduction in strength. By November 1989 Pentagon briefers were laying out plans to reduce army end strength by 23%, from 750,000 to 580,000. A number of incentives such as early retirement were used. In 1990 Iraq invaded its smaller neighbor, Kuwait, and U.S. land forces, quickly deployed to assure the protection of Saudi Arabia. In January 1991 Operation Desert Storm commenced, a U.S.-led coalition which deployed over 500,000 troops, the bulk of them from U.S. Army formations, to drive out Iraqi forces. The campaign ended in total victory, as Western coalition forces routed the Iraqi Army, organized along Soviet lines, in just one hundred hours.
Document 14: Gulf War: The Gulf War (2 August 199028 February 1991), codenamed Operation Desert Shield (2 August 199017 January 1991) for operations leading to the buildup of troops and defense of Saudi Arabia and Operation Desert Storm (17 January 199128 February 1991) in its combat phase, was a war waged by coalition forces from 35 nations led by the United States against Iraq in response to Iraq's invasion and annexation of Kuwait arising from oil pricing and production disputes. The war is also known under other names, such as the Persian Gulf War, First Gulf War, Gulf War I, Kuwait War, First Iraq War or Iraq War, before the term "Iraq War" became identified instead with the post-2003 Iraq War.
Document 15: Anti-aircraft warfare: Some nations started rocket research before World War II, including for anti-aircraft use. Further research started during the war. The first step was unguided missile systems like the British 2-inch RP and 3-inch, which was fired in large numbers from Z batteries, and were also fitted to warships. The firing of one of these devices during an air raid is suspected to have caused the Bethnal Green disaster in 1943. Facing the threat of Japanese Kamikaze attacks the British and US developed surface-to-air rockets like British Stooge or the American Lark as counter measures, but none of them were ready at the end of the war. The Germans missile research was the most advanced of the war as the Germans put considerable effort in the research and development of rocket systems for all purposes. Among them were several guided and unguided systems. Unguided systems involved the Fliegerfaust (literally "aircraft fist") as the first MANPADS. Guided systems were several sophisticated radio, wire, or radar guided missiles like the Wasserfall ("waterfall") rocket. Due to the severe war situation for Germany all of those systems were only produced in small numbers and most of them were only used by training or trial units.
ground_truth: 2 August 1990
sub_queries: What conflict involved JP233? Answer: Gulf War
What year did Gulf War start? Answer: 2 August 1990