Upon partition of the Indian subcontinent in 1947, Pakistan consisted of two in parts: West and East. Their common feature was Islam, but they differed language and culture. The more numerous Bengali population in East Pakistan was politically dominated by Urdu speaking West Pakistan. In 1970 the Awami League, a Bengali political party led by Sheikh Mujibur Rahman, won the first free election. Although the Awami League obtained a majority in the National Assembly, the president of Pakistan, Yahya Khan, postponed the convection of the Assembly. Sheikh Mujibur Rahman called for a strike in East Pakistan. Hence, on March 25 and 26 1970, the West Pakistani army marched into East Pakistan and launched severely repressive actions. Millions of Bengali fled to India causing incredible economic problems for this country. On 7 August 1971 Pakistani air-forces attacked India's western borders. A fortnight's war ended with India's victory over Pakistan, and with recognition of Bangladesh as an independent country. At the end of June 1972, the Presidents of India and Pakistan met in Simla and signed an agreement ending hostility.