Battle of Dien Bien Phu
The Battle of Dien Bien Phu ( ; , ) was a climactic confrontation of the First Indochina War that took place between 13 March and 7 May 1954. It was fought between the French Union's colonial Far East Expeditionary Corps and Viet Minh communist revolutionaries. The United States was officially not a party to the war, but it was secretly involved by providing financial and material aid, which included CIA contracted American personnel participating in the battle.