Question: When did Britain withdraw from the country where Gulf Air was located?

full_context: Document 1: Jazeera Airways: Jazeera Airways K.S.C () is a Kuwaiti airline with its head office on the grounds of Kuwait International Airport in Al Farwaniyah Governorate, Kuwait. It operates scheduled services in the Middle East. Its main base is Kuwait International Airport. The airline has grown since its launch to become Kuwait's second national airline and has been dynamic in popularizing low-cost carriers in the Middle East.
Document 2: British Empire: While the Suez Crisis caused British power in the Middle East to weaken, it did not collapse. Britain again deployed its armed forces to the region, intervening in Oman (1957), Jordan (1958) and Kuwait (1961), though on these occasions with American approval, as the new Prime Minister Harold Macmillan's foreign policy was to remain firmly aligned with the United States. Britain maintained a military presence in the Middle East for another decade. In January 1968, a few weeks after the devaluation of the pound, Prime Minister Harold Wilson and his Defence Secretary Denis Healey announced that British troops would be withdrawn from major military bases East of Suez, which included the ones in the Middle East, and primarily from Malaysia and Singapore. The British withdrew from Aden in 1967, Bahrain in 1971, and Maldives in 1976.
Document 3: DHL International Aviation ME: SNAS/DHL, incorporated as DHL International Aviation ME, is a cargo airline based in Bahrain. It is wholly owned by Deutsche Post DHL and operates the group's DHL Express-branded parcel and express services in the Middle East, including Afghanistan, Iraq and Pakistan. Its main base is Bahrain International Airport.
Document 4: Buraq Air: Buraq Air (El-Buraq Air Transport Inc) is an airline with its headquarters on the grounds of Mitiga International Airport in Tripoli, Libya. It operates scheduled domestic and international services to Europe, North Africa, and the Middle East. Buraq also operates passenger and cargo charter services and flights in support of CHC. Until recently, the airline's hub was Mitiga Airport, which, although smaller than Tripoli International Airport, is much closer to the city centre of Tripoli. Its new hub is Tripoli International.
Document 5: British Empire: Though Britain and the empire emerged victorious from the Second World War, the effects of the conflict were profound, both at home and abroad. Much of Europe, a continent that had dominated the world for several centuries, was in ruins, and host to the armies of the United States and the Soviet Union, who now held the balance of global power. Britain was left essentially bankrupt, with insolvency only averted in 1946 after the negotiation of a $US 4.33 billion loan (US$56 billion in 2012) from the United States, the last instalment of which was repaid in 2006. At the same time, anti-colonial movements were on the rise in the colonies of European nations. The situation was complicated further by the increasing Cold War rivalry of the United States and the Soviet Union. In principle, both nations were opposed to European colonialism. In practice, however, American anti-communism prevailed over anti-imperialism, and therefore the United States supported the continued existence of the British Empire to keep Communist expansion in check. The "wind of change" ultimately meant that the British Empire's days were numbered, and on the whole, Britain adopted a policy of peaceful disengagement from its colonies once stable, non-Communist governments were available to transfer power to. This was in contrast to other European powers such as France and Portugal, which waged costly and ultimately unsuccessful wars to keep their empires intact. Between 1945 and 1965, the number of people under British rule outside the UK itself fell from 700 million to five million, three million of whom were in Hong Kong.
Document 6: British Empire: Though Britain and the empire emerged victorious from the Second World War, the effects of the conflict were profound, both at home and abroad. Much of Europe, a continent that had dominated the world for several centuries, was in ruins, and host to the armies of the United States and the Soviet Union, who now held the balance of global power. Britain was left essentially bankrupt, with insolvency only averted in 1946 after the negotiation of a $US 4.33 billion loan from the United States, the last instalment of which was repaid in 2006. At the same time, anti-colonial movements were on the rise in the colonies of European nations. The situation was complicated further by the increasing Cold War rivalry of the United States and the Soviet Union. In principle, both nations were opposed to European colonialism. In practice, however, American anti-communism prevailed over anti-imperialism, and therefore the United States supported the continued existence of the British Empire to keep Communist expansion in check. The "wind of change" ultimately meant that the British Empire's days were numbered, and on the whole, Britain adopted a policy of peaceful disengagement from its colonies once stable, non-Communist governments were established to assume power. This was in contrast to other European powers such as France and Portugal, which waged costly and ultimately unsuccessful wars to keep their empires intact. Between 1945 and 1965, the number of people under British rule outside the UK itself fell from 700 million to five million, three million of whom were in Hong Kong.
Document 7: British Empire: In July 1956, Nasser unilaterally nationalised the Suez Canal. The response of Anthony Eden, who had succeeded Churchill as Prime Minister, was to collude with France to engineer an Israeli attack on Egypt that would give Britain and France an excuse to intervene militarily and retake the canal. Eden infuriated US President Dwight D. Eisenhower, by his lack of consultation, and Eisenhower refused to back the invasion. Another of Eisenhower's concerns was the possibility of a wider war with the Soviet Union after it threatened to intervene on the Egyptian side. Eisenhower applied financial leverage by threatening to sell US reserves of the British pound and thereby precipitate a collapse of the British currency. Though the invasion force was militarily successful in its objectives, UN intervention and US pressure forced Britain into a humiliating withdrawal of its forces, and Eden resigned.
Document 8: Kuwait Airways: Kuwait Airways (, ) is the national carrier of Kuwait, with its head office on the grounds of Kuwait International Airport, Al Farwaniyah Governorate. It operates scheduled international services throughout the Middle East, to the Indian subcontinent, Europe, Southeast Asia and North America, from its main base at Kuwait International. Kuwait Airways is a member of the Arab Air Carriers Organization.
Document 9: Gulf Air: Gulf Air ( "Ṭayarān al-Khalīj") is the flag carrier of Bahrain. Headquartered in Muharraq, adjacent to Bahrain International Airport, the airline operates scheduled services to 50 destinations in 28 countries across Africa, Asia and Europe. Its main base is Bahrain International Airport. It was formerly a multinational airline owned by Bahrain, UAE, Oman, and Qatar.
Document 10: British Empire: The Suez Crisis very publicly exposed Britain's limitations to the world and confirmed Britain's decline on the world stage, demonstrating that henceforth it could no longer act without at least the acquiescence, if not the full support, of the United States. The events at Suez wounded British national pride, leading one MP to describe it as "Britain's Waterloo" and another to suggest that the country had become an "American satellite". Margaret Thatcher later described the mindset she believed had befallen the British political establishment as "Suez syndrome", from which Britain did not recover until the successful recapture of the Falkland Islands from Argentina in 1982.
Document 11: Elizabeth II: In 1956, the British and French prime ministers, Sir Anthony Eden and Guy Mollet, discussed the possibility of France joining the Commonwealth. The proposal was never accepted and the following year France signed the Treaty of Rome, which established the European Economic Community, the precursor to the European Union. In November 1956, Britain and France invaded Egypt in an ultimately unsuccessful attempt to capture the Suez Canal. Lord Mountbatten claimed the Queen was opposed to the invasion, though Eden denied it. Eden resigned two months later.
Document 12: Afriqiyah Airways: Afriqiyah Airways ( "Al-Khuṭūṭ al-Jawwiyyah al-Afrīqiyyah") is a state-owned airline based in Tripoli, Libya. Before the 17 February 2011 revolution, it operated domestic services between Tripoli and Benghazi, and international scheduled services to over 25 countries in Europe, Africa, Asia and the Middle East; since the end of the war, it has been rebuilding its business. Afriqiyah Airways' main base is Tripoli International Airport, and the airline is a member of the Arab Air Carriers Organization.
Document 13: Bahrain SC: Al-Bahrain Sports Club (), otherwise simply known as Bahrain, is primarily a Bahraini football club based in the island-governorate of Al-Muharraq. Their football team currently plays in the Bahraini Premier League. Their home football stadium is the Al Muharraq Stadium, which they share along with their local island rivals, Al-Muharraq Sports Club. Bahrain Club also have teams for other sports, such as Basketball, Team Handball and Volleyball.
Document 14: Overseas military bases of the United Kingdom: The United Kingdom is still considered and remains a global power even into the 21st century; this is evidenced through the nation's 15 overseas military bases, making it second only to the United States in terms of total overseas bases worldwide. Currently, there is also the possibility of an additional two new bases being built in Oman and the United Arab Emirates in the near future. Note that both the United Arab Emirates and Oman were once under British rule, showing the impact of colonialism and the British armed forces military presence across the globe, even into the 21st century.
Document 15: British Empire: In 1951, the Conservative Party returned to power in Britain, under the leadership of Winston Churchill. Churchill and the Conservatives believed that Britain's position as a world power relied on the continued existence of the empire, with the base at the Suez Canal allowing Britain to maintain its pre-eminent position in the Middle East in spite of the loss of India. However, Churchill could not ignore Gamal Abdul Nasser's new revolutionary government of Egypt that had taken power in 1952, and the following year it was agreed that British troops would withdraw from the Suez Canal zone and that Sudan would be granted self-determination by 1955, with independence to follow. Sudan was granted independence on 1 January 1956.
ground_truth: 1971
sub_queries: Gulf Air >> country Answer: Bahrain
When did Britain withdraw from Bahrain ? Answer: 1971