far left Awami League under Mujibur Rahman won an overall majority of seats in Parliament and all but 2 of the 162 seats allocated to East Pakistan. The Awami League advocated greater autonomy for East Pakistan but the military government did not permit Mujib-ur-Rahman to form a government. East Pakistan became the independent state of Bangladesh on 16 December 1971. The term West Pakistan became redundant. Religion West Pakistan had an estimated population of 33 million during (1947) just before partition, of which nearly 22.77 million were Muslims constituting (69%) of the West Pakistan's population, nearly 7.92 million Hindus were living in this region just constituting 24% of the population as a second largest community. Sikhs are about 2 million comprising 6% of the region population and are third largest community in Pakistan just after Muslims and Hindus before partition. Migration During British India's partition, it was estimated that 15 million were displaced, and nearly more than 2 million consisting of Hindus, Muslims and Sikhs were killed in the deadly riots. During the period between 1947 and 1950, 8.6 million Muslims had moved to specially Pakistan's West Punjab region and about 6.7 million Hindus and Sikhs had gone the other way to India's East Punjab region and thus changing the demography of Pakistan drastically and resulting in overwhelming Muslim majority to this region. Government West Pakistan went through many political changes, and had a multiple political party system. West Pakistan's political system consisted of the popular influential Left-wing sphere against elite Right-wing circles. Parliamentary republic Since independence, Pakistan had been a federal parliamentary constitutional monarchy (even as of today, the parliamentary system is the official form of government of Pakistan) with a Prime minister as the head of the government and a Monarch as the head of state in a ceremonial office. The 1956 Constitution provided the country with Parliamentry form of Government and the office of President was inaugurated the same year. The career civil service officer Major-General (retired) Iskander Mirza became the country's first President, but the system did not evolve for more than the three years, when Mirza imposed the martial law in 1958. Mirza appointed army commander-in-chief General Ayub Khan as Chief Martial Law Administrator; he later turned his back on the President and exiled him to Great Britain after the military government was installed. The Supreme Court of Pakistan was a judicial authority, a power