Pakistan went to general elections on December 7, 1970, in which the Awami League led by Mujibur Rehman won a massive majority in the state assembly, and a clear majority in the National Assembly.
However, the largest party in West Pakistan, the Pakistan People's Party led by Zulfiqar Ali Bhutto was opposed to Mujib's demand for greater autonomy. Bhutto threatened to boycott the National Assembly if President Gen Yahya Khan invited Mujib to form a government.
Simultaneously, Bhutto sent a secret emissary to Mujib offering him the post of Prime Minister and Bhutto as President, without taking the army into confidence. Gen. Yahya Khan delayed the convening of National Assembly, and on March 7, 1971, Mujib addressing a huge gathering at Race Course Ground in Dhaka called for independence and civil disobedience.