Muhammad Zia-ul-Haq (12 August 1924 – 17 August 1988) was a Pakistani military officer and politician who served as the sixth president of Pakistan from 1978 until his death in an airplane crash in 1988. He also served as the second chief of the army staff of the Pakistan Army from 1976 until his death. The country's longest-serving de facto head of state and chief of the army staff, Zia's political ideology is known as Ziaism.
Born in Jalandhar, Punjab, Zia was trained at the Indian Military Academy in Dehradun and fought in the Second World War under the British Indian Army. Following the partition of India in 1947, he joined the Pakistan Army as a part of the Frontier Force Regiment. Zia was on active duty in Kashmir during the 1965 war between India and Pakistan, and after it he was promoted to colonel. During Black September, he played a prominent role as an advisor of the Jordanian Armed Forces against the Palestine Liberation Organization. In 1976, Zia was elevated to the rank of general and was appointed as chief of the army staff by Prime Minister Zulfikar Ali Bhutto, succeeding Tikka Khan. In July 1977, Zia organized Operation Fair Play, in which he overthrew Bhutto's federal government, declared martial law and assumed the office of the chief martial law administrator, dissolved the federal and provincial legislatures — hence suspending the provincial governments as well and declaring governor's rule across all provinces — and suspended the constitution. The coup was the second in Pakistan's history.