Question: when did the war began between north vietnam and south vietnam
Answer: The Vietnam War ( Vietnamese : Chiến tranh Việt Nam ) , also known as the Second Indochina War , and in Vietnam as the Resistance War Against America ( Vietnamese : Kháng chiến chống Mỹ ) or simply the American War , was a conflict that occurred in Vietnam , Laos , and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975 .