1975 Event Vietcong conquer Ban me Thuot South Vietnam 1973 Event US, North and South Vietnam and Vietcong sign boundary accord 1972 Event Vietcong forms revolutionary government in Quang Tri South Vietnam 1968 Event Vietcong launch Tet-offensive on U.S. embassy in Saigon 1965 Event U.S. confirms its troops used chemical warfare against the Vietcong
