The Vietnam War was a military struggle fought in Vietnam from 1959 to 1975, involving the North Vietnamese and the National Liberation Front (NLF) in conflict with United States forces and the South Vietnamese army. From 1946 until 1954, the Vietnamese had struggled for their independence from France during the First Indochina War. At the end of this war, the country was temporarily divided into North and South Vietnam. North Vietnam came under the control of the Vietnamese Communists who had opposed France and who aimed for a unified Vietnam under Communist rule. The South was controlled by Vietnamese who had collaborated with the French.

In 1965 the United States sent in troops to prevent the South Vietnamese government from collapsing. Ultimately, however, the United States failed to achieve its goal, and in 1975 Vietnam was reunified under Communist control; in 1976 it officially became the Socialist Republic of Vietnam. During the conflict, approximately 3 to 4 million Vietnamese on both sides were killed, in addition to another 1.5 to 2 million Lao and Cambodians who were drawn into the war. More than 58,000 Americans lost their lives