The Vietnam War took place.
The First Battle of Saigon , fought during the Tet Offensive of the Vietnam War , was the coordinated attack by communist forces , including both the North Vietnamese Army and the Viet Cong , against Saigon , the capital of South Vietnam . The role of the United States in the Vietnam War began after World War II and escalated into full commitment during the Vietnam War from 1955 to 1975 . The Vietnam War ( Chiến tranh Việt Nam ) , also known as the Second Indochina War , and known in Vietnam as Resistance War Against America ( Kháng chiến chống Mỹ ) or simply the American War , was a war that occurred in Vietnam , Laos , and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975 . The capture of Saigon by the North Vietnamese Army in April 1975 marked the end of the war , and North and South Vietnam were reunified the following year .