The Vietnam War was a long, costly and divisive conflict that pitted the communist government of North Vietnam against South Vietnam and its principal ally, the United States.
The conflict was intensified by the ongoing Cold War between the United States and the Soviet Union.
the two Vietnams were united under a communist banner in July 1976. Neighbouring Laos and Cambodia similarly fell to communists.
the spread of communism during the Cold War, American containment, and European imperialism in Vietnam.
the spread of communism during the Cold War, American containment, and European imperialism in Vietnam.