Which event in 1975 signaled the end of the Republic of Vietnam?

• A. Tet Offensive
• B. Fall of Saigon
• C. Paris Peace Accords
• D. Dien Bien Phu

Answer: (B)

The main idea here is identifying the moment when South Vietnam ceased to exist as a separate state and the country moved toward unification under the North. In 1975, North Vietnamese forces captured Saigon, the capital, on April 30, marking the definitive end of the Republic of Vietnam. The fall led to the evacuation of many people and the rapid collapse of the South Vietnamese government, after which Vietnam was reunified under Communist control as the Socialist Republic of Vietnam.

This event is distinct from other 20th-century turning points in Vietnam. The Tet Offensive in 1968 was a major military and political blow that shifted public opinion against the war, but it did not end South Vietnam. The Paris Peace Accords of 1973 halted U.S. involvement, yet South Vietnam remained in place until 1975. Dien Bien Phu in 1954 ended French colonial rule in Indochina and set up the division of Vietnam, not the end of the Republic of Vietnam.