Question: who did the usa support in the vietnam war
Answer: Date 1 November 1955 -- 30 April 1975 ( 1975 - 04 - 30 ) ( 19 years , 5 months , 4 weeks and 1 day ) Location South Vietnam , North Vietnam , Cambodia , Laos Result North Vietnamese victory Withdrawal of American - led forces from Indochina Communist governments take power in South Vietnam , Cambodia and Laos South Vietnam is annexed by North Vietnam Territorial changes Reunification of North and South Vietnam into the Socialist Republic of Vietnam .