Gen. Zia ul Haq took power in Pakistan in 1977 through a bloodless coup. Over the next 11 years, he instituted "Islamization" policies and cracked down on press freedoms, political opposition, and dissent. These policies included imposing sharia law, banning student unions and Ahmadi religious practices, and amending the constitution to strengthen the presidency. Zia remained in power through manipulated elections and referendums until his death in a 1988 plane crash.