Question: What happened in the country Koh Russei is located in during the Cold War?

full_context: Document 1: Koh Russei: Koh Russei,Koh Russey or "Bamboo Island" (Khmer: កោះឬស្សី) is one of a group of small islands in the Gulf of Thailand, located about off the coast of Sihanoukville city in southern Cambodia. It is administered by Prey Nob District in Sihanoukville Province.
Document 2: Koh Thmei: Koh Thmei ("New Island", Khmer: កោះថ្មី, former French name: Ile du Milieu), is an island of Cambodia, situated in the Gulf of Thailand, immediately south-east of the Sihanoukville headland. Although clearly inside the protected area of Ream National Park, a number of development companies have obtained long lasting land-lease concessions since 2010. Announced were large-scale plans, including a bridge to the mainland. By August 2014 the island hasn't yet undergone any alterations. In early 2018, development hastened on the island, partly prompted by the launch of the Golden Silver Gulf Tourism Zone project, which encompasses Koh Thmei.
Document 3: Vietnam War: Beginning in 1970, American troops were withdrawn from border areas where most of the fighting took place, instead redeployed along the coast and interior, and US casualties in 1970 were less than half of 1969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 4: 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 5: 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 6: 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 7: Phú Quốc: Phú Quốc (), is the largest island in Vietnam. Phú Quốc and nearby islands, along with distant Thổ Chu Islands, is part of Kiên Giang Province as Phú Quốc District, the island has a total area of and a permanent population of approximately 103,000. Located in the Gulf of Thailand, the district of Phú Quốc includes the island proper and 21 smaller islets. Dương Đông town, is located on the west coast, and is also the administrative and largest town on the island. The other township is An Thoi on the southern tip of the island.
Document 8: 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 9: Roluos: Roluos, also Phumi Roluos Chas, is a small town and khum (commune) of Svay Chek District in Banteay Meanchey Province in north-western Cambodia. It is located on road 56, 24km north of Sisophon.
Document 10: 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 11: Mu Ko Siboya: Mu Ko Siboya, also known as Ko Siboya Tambon, is a group of islands which is part of Nuea Khlong District in Krabi Province, Thailand.
Document 12: 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 13: 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 14: Hat Khanom–Mu Ko Thale Tai National Park: The name of the park refers to the two major parts of the park. Hat Khanom refers to the beaches of Khanom District, and the Thale Tai archipelago consists of eight islands in the Gulf of Thailand (Ko Mut Tang, Ko Mut Kong, Ko Rap, Ko Hua Ta Khe, Ko Wang Nai, Ko Wang Nak, Ko Noi, and Ko Ta Rai, all in the Sichon and Khanom District, Nakhon Si Thammarat Province, and Ko Samui District, Surat Thani) between Khanom and Ko Samui.
Document 15: Ko Lamphu: Ko Lamphu (เกาะลำพู) is a small island in the Tapi River, Thailand, about from the river's mouth, near the town center of Surat Thani. It is connected by bridge to the city at the pillar shrine.
ground_truth: Cambodian Civil War
sub_queries: Koh Russei >> country Answer: Cambodia
what happened in Cambodia during the cold war Answer: Cambodian Civil War