In 1961, after its vote of self-determination, Algeria declared independence and the French announced it was independent. Boumédiène headed a powerful military faction within the government, and was made defence minister by the Algerian leader Ahmed Ben Bella, whose ascent to power he had assisted as chief of staff. Boumédiène was also appointed as Vice President of Algeria in September 1963. He grew increasingly distrustful of Ben Bella's erratic style of government and ideological puritanism, and in June 1965, Boumédiène seized power in a bloodless coup.