Pakistan adopted its first constitution in 1956. Three Bengalis were its Prime Minister until 1957: Nazimuddin, Mohammad Ali of Bogra and Suhrawardy. None of the three completed their terms, and resigned from office. The Pakistan Army imposed military rule in 1958, and Ayub Khan was the country's strongman for 11 years. Political repression increased after the coup. Khan introduced a new constitution in 1962, replacing Pakistan's parliamentary system with a presidential and gubernatorial system (based on electoral college selection) known as Basic Democracy. In 1962 Dhaka became the seat of the National Assembly of Pakistan, a move seen as appeasing increased Bengali nationalism. The Pakistani government built the controversial Kaptai Dam, displacing the Chakma people from their indigenous homeland in the Chittagong Hill Tracts. During the 1965 presidential election, Fatima Jinnah lost to Ayub Khan despite support from the Combined Opposition alliance (which included the Awami League). The Indo-Pakistani War of 1965 blocked cross-border transport links with neighbouring India in what is described as a second partition. In 1966, Awami League leader Sheikh Mujibur Rahman announced a six-point movement for a federal parliamentary democracy.