Which event removed the South Vietnamese leader from power in 1963?

• A. The assassination of Ngo Dinh Diem
• B. The fall of Saigon
• C. The Geneva Accords
• D. The Tet Offensive

Answer: (A)

In 1963, Ngo Dinh Diem was removed from power through a military coup in South Vietnam, culminating in his assassination. Generals, unhappy with his autocratic rule and the Buddhist crisis, seized control with at least tacit support from parts of the U.S. government. Diem and his brother were killed, ending his leadership and plunging South Vietnam into a period of political instability and shifting governments. The other events listed don’t fit the year or outcome: the fall of Saigon happened in 1975, the Geneva Accords were in 1954–55, and the Tet Offensive occurred in 1968, none of which directly removed Diem from power in 1963.