The East Pakistan Awami League, under Sheikh Mujibur Rahman, won an overwhelming majority in the National Assembly taking 153 of the 163 seats allotted to East Pakistan. The opening session of the National Assembly, scheduled to meet in Dhaka in March 1971, was postponed by Yahya Khan twice, who then cancelled the election results, banned the Awami League, and imprisoned Sheik Mujib in West Pakistan on charges of treason. East Pakistan declared its independence as Bangladesh on March 26, 1971, but was placed under martial law and occupied by the Pakistani army.
Consequentially, around 10 million refugees fled to India and hundreds of thousands of civilians were killed in the civil war. Supporting Bangladesh, India and on December 3, 1971, sent troops into East Pakistan. Following a two-week war between Pakistan and India, Pakistani troops in East Pakistan surrendered on December 16, 1971, and a cease-fire was declared.
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