The Battle of Dien Bien Phu (; ) was the climactic battle of the First Indochina War between French Union forces of the French Far East Expeditionary Corps, and VietnameseViet Minh communist revolutionary forces. The battle occurred between March and May 1954, and culminated in a massive French defeat that effectively ended the war. Dien Bien Phu was "the first time that a non-European colonial independence movement had evolved through all the stages from guerrilla bands to a conventionally organized and equipped army able to defeat a modern Western occupier in pitched battle."
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