Unu, in 1947, became the Prime Minister of the Provisional Government of Burma. He retained that post after independence in 1948 and, except for seven months in 1956–1957, he had been the duly elected Prime Minister until he gave up office in September, 1958, after the serious split in the ruling party, the Anti-Fascist Peoples' Freedom League (AFPFL). From then until the third national elections of February, 1960, General Ne Win, Chief of the Burma Defense Forces, held the reins of what was called a “caretaker government”, in which he proceeded strictly according to the constitution adopted in 1947. U Nu's Party won an overwhelming victory at the polls in 1960 and once again, with almost 80 per cent parliamentary backing in the 250-man Chamber of Deputies, the more powerful chamber in the bicameral parliament, he set about to govern Burma. On March 2, 1962, General Ne Win staged a coup. He took over the government in the name of a military Revolutionary Council, arrested the previous cabinet members, and set aside Burma's constitution.