Vietnam War: A prolonged conflict (1955-1975) between North Vietnam (supported by communist allies) and South Vietnam (supported by the United States). It was marked by direct military involvement of U.S. troops.
Gulf of Tonkin Incident: An event that occurred in 1964 when U.S. naval vessels were allegedly attacked by North Vietnamese forces in the Gulf of Tonkin. This incident led to increased direct military involvement by the U.S. in Vietnam.
Tet Offensive: A major campaign launched by North Vietnamese forces during the Vietnam War in 1968, resulting in intense fighting across South Vietnam and further escalating direct U.S. military involvement.