During the elections of 1977, all the political parties in the country had decided to fight against People’s Party. All the parties formed an alliance called ‘Pakistan National Alliance’. Maulana Mufti Mahmud was its Head. The National Assembly elections were held on 7th March, 1977 in which People’s Party won with a great majority. The National Alliance blamed it of rigging the polls and boycotted the provincial elections held on 10th March. The elections were declared invalid. A movement called ‘Nizam-e-Mustafa’ was started. When the situation was beyond control, Mr. Bhutto invited the National Alliance for negotiations. The negotiations were still in progress. When army’s Chief, Zia-ul-Haq, overthrew the Bhutto government and declared martial law on 5th July 1977. He ruled over the country for about 11 years from July 1977 to August 1988. General Zia-ulHaq was killed in an air crash on 17th August, 1988. The Chairman of Senate, Ghulam Ishaq Khan, took over as the Caretaker President of Pakistan