Which conflict occurred between December 31, 1960 and May 7, 1975?

The Vietnam Conflict is correctly identified as the conflict that occurred between December 31, 1960, and May 7, 1975. This timeframe marks important milestones in U.S. involvement in Vietnam, beginning with the formal commitment of U.S. military advisors and support to the South Vietnamese government in the early 1960s and extending through the fall of Saigon in 1975, which effectively marked the end of the Vietnam War.

In contrast, the other listed conflicts occurred outside of this time period. World War II took place from 1939 to 1945; the Korean Conflict spanned from 1950 to 1953; and World War I occurred from 1914 to 1918. Each of these conflicts has distinct historical contexts and timelines that do not overlap with the specified dates for the Vietnam Conflict, highlighting the significance of this conflict in shaping U.S. military and foreign policy during the 1960s and early 1970s.