Question: What happened in the country where President Airlines is based during the Cold War?

full_context: Document 1: Military history of Australia during the Vietnam War: Australian involvement in the Vietnam War Part of the Vietnam War Australian soldiers from 7 RAR waiting to be picked up by US Army helicopters following a cordon and search operation near Phuoc Hai on 26 August 1967. This image is etched on the Vietnam Forces National Memorial, Canberra. Location Republic of Vietnam Objective To support South Vietnam against Communist attacks Date 3 August 1962 -- 2 December 1972 Executed by Approximately 61,000 military personnel Casualties 521 killed, ~ 3,000 wounded
Document 2: Camair-Co: The Cameroon Airlines Corporation, trading as Camair-Co, is an airline from Cameroon, serving as flag carrier of the country, a role which was previously filled by the now-defunct Cameroon Airlines. Camair-Co has its headquarters in the Immeuble La Rotonde in Douala, and operates out of Douala International Airport.
Document 3: Soviet–Afghan War: The Soviet -- Afghan War lasted over nine years, from December 1979 to February 1989. Insurgent groups known as the mujahideen fought against the Soviet Army and the Democratic Republic of Afghanistan government, mostly in the country's rural countryside. The mujahideen groups were backed by the United States and Pakistan, making it a Cold War proxy war. Between 562,000 and 2,000,000 civilians were killed and millions of Afghans fled the country as refugees, mostly to Pakistan and Iran.
Document 4: President Airlines: President Airlines was an airline based in Phnom Penh, Cambodia. It was privately owned and operated scheduled passenger flights from Phnom Penh to domestic destinations, as well as flights to Thailand, Republic of China and Hong Kong out of Phnom Penh International Airport.
Document 5: Vietnam War: Direct U.S. military involvement ended on 15 August 1973. The capture of Saigon by the North Vietnamese Army in April 1975 marked the end of the war, and North and South Vietnam were reunified the following year. The war exacted a huge human cost in terms of fatalities (see Vietnam War casualties). Estimates of the number of Vietnamese soldiers and civilians killed vary from 966,000 to 3.8 million. Some 240,000 -- 300,000 Cambodians, 20,000 -- 62,000 Laotians, and 58,220 U.S. service members also died in the conflict, and a further 1,626 remain missing in action.
Document 6: Military history of the United States: The Vietnam War was a war fought between 1959 and 1975 on the ground in South Vietnam and bordering areas of Cambodia and Laos (see Secret War) and in the strategic bombing (see Operation Rolling Thunder) of North Vietnam. American advisors came in the late 1950s to help the RVN (Republic of Vietnam) combat Communist insurgents known as "Viet Cong." Major American military involvement began in 1964, after Congress provided President Lyndon B. Johnson with blanket approval for presidential use of force in the Gulf of Tonkin Resolution.
Document 7: Air Niugini: Air Niugini Limited is the national airline of Papua New Guinea, based in Air Niugini House on the property of Jacksons International Airport, Port Moresby. It operates a domestic network from Port Moresby to all 12 major airports while the subsidiary company Link PNG operates the minor airports. It also operates international services in Asia, Oceania, and Australia on a weekly basis. Its main base is Jacksons International Airport which is located in 7 Mile, Port Moresby, Papua New Guinea. "Niugini" is the Tok Pisin word for "New Guinea".
Document 8: United States Army: During the Cold War, American troops and their allies fought Communist forces in Korea and Vietnam. The Korean War began in 1950, when the Soviets walked out of a U.N. Security meeting, removing their possible veto. Under a United Nations umbrella, hundreds of thousands of U.S. troops fought to prevent the takeover of South Korea by North Korea, and later, to invade the northern nation. After repeated advances and retreats by both sides, and the PRC People's Volunteer Army's entry into the war, the Korean Armistice Agreement returned the peninsula to the status quo in 1953.
Document 9: Cambodian Civil War: Cambodian Civil War Part of the Vietnam War, the Indochina Wars, and the Cold War US tanks entering a town in Cambodia in 1970. Date 17 January 1968 -- 17 April 1975 (5 years and 3 months) Location Cambodia Result Khmer Rouge victory Fall of the Kingdom of Cambodia Creation, then collapse, of the Khmer Republic Establishment of Democratic Kampuchea Beginning of the Cambodian genocide Belligerents Kingdom of Cambodia (1967 -- 1970) Khmer Republic (1970 -- 1975) United States South Vietnam Other Support Australia Canada France India Thailand Japan Malaysia Singapore Royal United National Government of Kampuchea ∟ National United Front of Kampuchea ∟ Khmer Rouge ∟ Khmer Rumdo North Vietnam Việt Cộng Other Support China Czechoslovakia Soviet Union Commanders and leaders Lon Nol Sisowath Sirik Matak Long Boret Richard Nixon Pol Pot Khieu Samphan Ieng Sary Nuon Chea Son Sen Norodom Sihanouk Strength 30,000 (1968) 35,000 (1970) 100,000 (1972) 200,000 (1973) 50,000 (1974) 4,000 (1970) 70,000 (1972) 40,000 -- 60,000 (1975) Casualties and losses 275,000 -- 310,000 killed
Document 10: Vietnam War: Beginning in 1970, American troops were withdrawn from border areas where most of the fighting took place, instead redeployed along the coast and interior, and US casualties in 1970 were less than half of 1969 casualties after being relegated to less active combat. At the same time that US forces were deployed, the Army of the Republic of Vietnam took over combat operations throughout the country, with casualties doubled US casualties in 1969, and more than tripled US ones in 1970. The post-Tet environment saw a rise in membership in Regional Force and Popular Force militias, now more capable of providing village security which the Americans could not under Westmoreland. In 1970 Nixon announced the withdrawal of an additional 150,000 American troops, reducing the number of Americans to 265,500. By 1970 the Viet Cong forces were no - longer southern - majority, and nearly 70% of units were northerners. Between 1969 to 1971 the Viet Cong and some PAVN units had reverted to small unit tactics typical of 1967 and prior instead of nation - wide grand offensives. In 1971 Australia and New Zealand withdrew their soldiers and U.S. troop count was further reduced to 196,700, with a deadline to remove another 45,000 troops by February 1972. The United States also reduced support troops and in March 1971 the 5th Special Forces Group, the first American unit deployed to South Vietnam, withdrew to Fort Bragg, North Carolina.
Document 11: PMTair: PMTair (Progress MulTi Air) was a Cambodian airline offering regularly scheduled domestic and international passenger and cargo services out of Phnom Penh International Airport.
Document 12: Cathay Pacific: Cathay Pacific Airways Limited is the flag carrier of Hong Kong, with its head office and main hub located at Hong Kong International Airport. The airline's operations and subsidiaries have scheduled passenger and cargo services to 201 destinations in more than 60 countries worldwide including codeshares and joint ventures. Cathay Pacific operates a fleet of wide - body aircraft, consisting of Airbus A330, Airbus A350 and Boeing 777 equipment. Cathay Pacific Cargo operates two models of the Boeing 747. Wholly owned subsidiary airline Cathay Dragon operates to 44 destinations in the Asia - Pacific region from its Hong Kong base. In 2010, Cathay Pacific and Cathay Pacific Cargo, together with Dragonair (rebranded Cathay Dragon), carried nearly 27 million passengers and over 1.8 million tons of cargo and mail.
Document 13: Kampuchea Airlines: Kampuchea Airlines was an airline based in Phnom Penh, Cambodia, operating regional passenger services out of Phnom Penh International Airport.
Document 14: Military history of the United States: Fighting on one side was a coalition of forces including the Republic of Vietnam (South Vietnam or the "RVN"), the United States, supplemented by South Korea, Thailand, Australia, New Zealand, and the Philippines. The allies fought against the North Vietnamese Army (NVA) as well as the National Liberation Front (NLF, also known as Viet communists Viet Cong), or "VC", a guerrilla force within South Vietnam. The NVA received substantial military and economic aid from the Soviet Union and China, turning Vietnam into a proxy war.
Document 15: PNG Air: PNG Air is an airline based on the grounds of Jacksons International Airport, Port Moresby, Papua New Guinea. It operates scheduled domestic and international flights, as well as contract corporate charter work. Its main base is Jacksons International Airport.
ground_truth: Cambodian Civil War
sub_queries: President Airlines >> country Answer: Cambodia
what happened in Cambodia during the cold war Answer: Cambodian Civil War