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In page Võ Nguyên Giáp:

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On 13 March 1954, Giáp launched his offensive.[11] For 54 days, the Viet Minh seized position after position, pushing the French until they occupied only a small area of Dien Bien Phu. Colonel Piroth, the artillery commander, blamed himself for the destruction of French artillery superiority. He told his fellow officers that he had been "completely dishonoured" and committed suicide with a hand grenade.[12] General De Castries, French Commander in Dien Bien Phu, was captured alive in his bunker. The French surrendered on 7 May. Their casualties totaled over 2,200 killed, 5,600 wounded, and 11,721 taken prisoner. The following day the French government announced that it intended to withdraw from Vietnam.[citation needed]