During which years did the Vietnam War take place?

The Vietnam War is generally recognized as occurring between 1955 and 1975. This time frame encapsulates significant events in Vietnam's struggle for autonomy and the U.S. military involvement in the region.

The war began when the communist-led North Vietnam, supported by the Soviet Union and China, fought against the government of South Vietnam, which was backed by the United States. Official U.S. involvement escalated in the early 1960s, particularly after events such as the Gulf of Tonkin incident in 1964, leading to an increased military presence and direct combat operations.

By 1975, North Vietnam successfully captured Saigon, the capital of South Vietnam, marking the end of the war and leading to the reunification of Vietnam under communist control. Thus, the years 1955 to 1975 accurately encompass the entire scope of the Vietnam War, highlighting both the military engagements and the political developments that characterized this tumultuous period.

The other options provided do not encompass the full duration of the Vietnam War, either starting too late or ending prematurely, hence they are not accurate representations of the conflict.