Viet Cong
South Vietnam was overrun by communist forces.
1975
became Communist and reunited with North Vietnam
The fall of Cambodia and South Vietnam to Communist forces was probably the big event.
To prevent the communist take over of South Vietnam.
They wanted it under Communist North Vietnamese control; a united Vietnam...what it is today. They won the war, remember?
Communist sympathizers living in South Vietnam; often conducting guerrilla warfare against Republic of South Vietnam Government forces.
They were the resistance element within South Vietnam and were largely controlled by the Communist North Vietnamese.
Because of the domino theory. The North was communist and wanted to unite Vietnam to become one communist country. The USA backed the south because it wasn't communist and didn't want Vietnam to fall to communism.
At the South Vietnam Presidential Palace compound in Saigon on April 30, 1975 when North Vietnamese communist forces accepted the surrender of South Vietnam.
The US didn't invade South Vietnam. The Republic of South Vietnam asked for US help as they couldn't stem the Red Tide (communist infiltration).
Communist guerrilla movement in Vietnam that fought the South Vietnamese government forces 1954-75 with the support of the North Vietnamese army and opposed the South Vietnamese and US forces in the Vietnam War.