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American aid to Diem increased
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Number of U.S military advisors in South Vietnam rises to 12,000
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President Diem is overthrown and then killed in a US-backed military coup
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Viet Cong, the communist guerillas operating in South Vietnam, defeat units of the ARVN, the South Vietnamese Army
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United States enters war
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Golf of Tonkin Incident
The United States says North Vietnamese patrol boats fire on two US Navy destroyers -
United States Congress approves Gulf of Tonkin Resolution
authorizing military action in region -
200,000 American combat troops arrive in South Vietnam
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United States troop members in Vietnam rise to 400,000
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Tet Offensive
a combined assault by Viet Cong and the North and the North Vietnamese army on US positions begins -
More than 500 civilians die in the US massacre at My Lai
Thousands are killed by communist forces during their occupation of the city Hue -
Ho Chi Minh dies
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President Nixon begins to reduce US ground troops in Vietnam as domestic public opposition to the war grows
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Ceasefire agreement in Paris
US troop pullout completed by March -
North Vietnamese troops invade South Vietnam and take control of the whole country after South Vietnamese President, Duong Van Minh surrenders.