Boumedienne, Houari, 1932?-78, president and prime minister of Algeria (1965-78). While studying in Cairo during the early 1950s he joined a group of expatriate Algerian nationalists that included Ahmed Ben Bella. Boumedienne secretly reentered Algeria (1955) to join a group of guerrillas operating in the province of Oran. He was (1960-62) chief of staff of the exiled National Liberation Army in Tunisia and served as Algeria's minister of defense from the time of its independence. After a series of disputes with Ben Bella, Boumedienne led a coup that overthrew his former ally's government. After the coup, Boumedienne assumed the posts of president, prime minister, and chairman of the revolutionary council.