The Vietnam War, also known as the American War (by the Vietnamese) or the Second Indochina War, was a Cold War-era proxy war that occurred in Vietnam, Laos, and Cambodia from approximately 1 November 1955 (accounts differ) to the fall of Saigon on 30 April 1975.
This war followed the First Indochina War (1946–54) and was fought between North Vietnam—supported by the Soviet Union, China and other communist allies—and the government of South Vietnam—supported by the United States and other anti-communistallies. The Viet Cong (also known as the National Liberation Front, or NLF), a South Vietnamese communist common front aided by the North, fought a guerrilla war against anti-communist forces in the region. The People's Army of Vietnam (also known as the North Vietnamese Army) engaged in a more conventional war, at times committing large units to battle. The war exacted a huge human cost in terms of fatalities (see Vietnam War casualties). Estimates of the number of Vietnamese soldiers and civilians killed vary from 800,000 to 3.1 million. Some 200,000–300,000 Cambodians, 20,000–200,000 Laotians, and 58,220 U.S. service members also died in the conflict.