The Vietnamese boat people came to Australia to escape the communist government that took over the country after the end of the Vietnam War in 1975. The term Vietnamese boat people refers mostly to Vietnamese people from the former South Vietnam.
https://www.reference.com/history/year-did-vietnam-war-start-end-3fec54f91c4b281b
They viewed the conflict as a colonial war and a continuation of the First Indochina War against forces from France and later on the U.S. The U.S. government viewed its involvement in the war as a way to prevent a Communist takeover of South Vietnam.
https://en.wikipedia.org/wiki/Vietnam_War
There are many reasons why the United States was unable to win the Vietnam War, but the most pressing issue at the time that caused its end was public opinion, which turned overwhelmingly against the war after the Vietcong launched the Tet Offensive in 1968.
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The conflict escalated, and South Vietnam signed a treaty with the United States in 1961 for military and economic aid. Diem was executed after a coup in 1963; however, the war continued until U.S. combat units withdrew in 1973, and South Vietnam fell to an invasion by the North in 1975.
https://www.reference.com/history/year-did-vietnam-war-start-end-3fec54f91c4b281b
Although Nixon did continue to decrease American troop strength in South Vietnam, the fighting continued. In 1972, the North Vietnamese launched a massive invasion of South Vietnam. The South Vietnamese forces reeled under the attack, but eventually prevailed with the help of U.S. airpower. After extensive negotiations and the bombing of North Vietnam in December 1972, the Paris Peace Accords were signed in January 1973.
http://www.history.com/this-day-in-history/nixon-declares-vietnam-war-is-ending
Nixon’s pronouncements that the war was ending proved premature. In April 1970, he expanded the war by ordering U.S. and South Vietnamese troops to attack communist sanctuaries in Cambodia. The resulting outcry across the United States led to a number of antiwar demonstrations—it was at one of these demonstrations that the National Guard shot four protesters at Kent State.
http://www.history.com/this-day-in-history/nixon-declares-vietnam-war-is-ending
At a news conference, President Richard Nixon says that the Vietnam War is coming to a “conclusion as a result of the plan that we have instituted.” Nixon had announced at a conference in Midway in June that the United States would be following a new program he termed “Vietnamization.”.
http://www.history.com/this-day-in-history/nixon-declares-vietnam-war-is-ending
The war changed the dynamics between the Eastern and Western Blocs, and altered North–South relations. 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).
https://en.wikipedia.org/wiki/Vietnam_War
The Vietnam War centered on the desire of North Vietnam to create a unified communist government in the country. South Vietnam's leader, President Ngo Dinh Diem, canceled elections concerning reunification and was denounced by the leader of North Vietnam, Ho Chi Minh.
https://www.reference.com/history/year-did-vietnam-war-start-end-3fec54f91c4b281b
The Vietnam War began in 1954 and ended in 1975. The war started soon after the Geneva Conference, which divided Vietnam into two nations at the 17th parallel.
https://www.reference.com/history/year-did-vietnam-war-start-end-3fec54f91c4b281b
when did the vietnam war end
The Vietnam war ended in 1975. Vietnam war ended in 1975.