With increasing anti-government unrest, the army grew restive. On July 5, 1977, the military removed Bhutto from power and arrested him, declared martial law, and suspended portions of the 1973 constitution. Chief of Army Staff Gen. Muhammad Zia ul-Haq became Chief Martial Law Administrator and promised to hold new elections within three months.
Zia released Bhutto and asserted that he could contest new elections scheduled for October 1977. However, after it became clear that Bhutto's popularity had survived his government, Zia postponed the elections and began criminal investigations of the senior PPP leadership. Subsequently, Bhutto was convicted and sentenced to death for alleged conspiracy to murder a political opponent. Despite international appeals on his behalf, Bhutto was hanged on April 6, 1979.
Zia assumed the Presidency and called for elections in November. However, fearful of a PPP victory, Zia banned political activity in October 1979 and postponed national elections.
In 1980, most center and left parties, led by the PPP, formed the Movement for the Restoration of Democracy (MRD). The MRD demanded Zia's resignation, an end to martial law, new elections, and restoration of the constitution as it existed before Zia's takeover. In early December 1984, President Zia proclaimed a national referendum for December 19 on his "Islamization" program. He implicitly linked approval of "Islamization" with a mandate for his continued presidency. Zia's opponents, led by the MRD, boycotted the elections. When the government claimed a 63% turnout, with more than 90% approving the referendum, many observers questioned these figures.
On March 3, 1985, President Zia proclaimed constitutional changes designed to increase the power of the President vis-a-vis the Prime Minister (under the 1973 constitution the President had been mainly a figurehead). Subsequently, Zia nominated Muhammad Khan Junejo, a Muslim League member, as Prime Minister. The new National Assembly unanimously endorsed Junejo as Prime Minister and, in October 1985, passed Zia's proposed eighth amendment to the constitution, legitimizing the actions of the martial law government, exempting them from judicial review (including decisions of the military courts), and enhancing the powers of the President.
On December 30, 1985, President Zia removed martial law and restored the fundamental rights safeguarded under the constitution. He also lifted the Bhutto government's declaration of emergency powers. The first months of 1986 witnessed a rebirth of political activity throughout Pakistan. All parties -- including those continuing to deny the legitimacy of the Zia/Junejo government -- were permitted to organize and hold rallies. In April 1986, PPP leader Benazir Bhutto, daughter of Zulfiqar Ali Bhutto, returned to Pakistan from exile in Europe.
Following the lifting of martial law, the increasing political independence of Prime Minister Junejo and his differences with Zia over Afghan policy resulted in tensions between them. On May 29, 1988, President Zia dismissed the Junejo government and called for November elections. In June, Zia proclaimed the supremacy in Pakistan of Shari'a (Islamic law), by which all civil law had to conform to traditional Muslim edicts.
On August 17, a plane carrying President Zia, American Ambassador Arnold Raphel, U.S. Brig. General Herbert Wassom, and 28 Pakistani military officers crashed on a return flight from a military equipment trial near Bahawalpur, killing all of its occupants. In accordance with the constitution, Chairman of the Senate Ghulam Ishaq Khan became Acting President and announced that elections scheduled for November 1988 would take place.
After winning 93 of the 205 National Assembly seats contested, the PPP, under the leadership of Benazir Bhutto, formed a coalition government with several smaller parties, including the Muhajir Qaumi Movement (MQM). The Islamic Democratic Alliance (IJI), a multi-party coalition led by the PML and including religious right parties such as the Jamaat-i-Islami (JI), won 55 National Assembly seats.
Differing interpretations of constitutional authority, debates over the powers of the central government relative to those of the provinces, and the antagonistic relationship between the Bhutto Administration and opposition governments in Punjab and Balochistan seriously impeded social and economic reform programs. Ethnic conflict, primarily in Sindh province, exacerbated these problems. A fragmentation in the governing coalition and the military's reluctance to support an apparently ineffectual and corrupt government were accompanied by a significant deterioration in law and order.
In August 1990, President Khan, citing his powers under the eighth amendment to the constitution, dismissed the Bhutto government and dissolved the national and provincial assemblies. New elections, held in October 1990, confirmed the political ascendancy of the IJI. In addition to a two-thirds majority in the National Assembly, the alliance acquired control of all four provincial parliaments and enjoyed the support of the military and of President Khan. Muhammad Nawaz Sharif, as leader of the PML, the most prominent Party in the IJI, was elected Prime Minister by the National Assembly.
Sharif emerged as the most secure and powerful Pakistani Prime Minister since the mid-1970s. Under his rule, the IJI achieved several important political victories. The implementation of Sharif's economic reform program, involving privatization, deregulation, and encouragement of private sector economic growth, greatly improved Pakistan's economic performance and business climate. The passage into law in May 1991 of a Shari'a bill, providing for widespread Islamization, legitimized the IJI government among much of Pakistani society.
After PML President Junejo's death in March 1993, Sharif loyalists unilaterally nominated him as the next party leader. Consequently, the PML divided into the PML Nawaz (PML/N) group, loyal to the Prime Minister, and the PML Junejo group (PML/J), supportive of Hamid Nasir Chatta, the President of the PML/J group.
However, Nawaz Sharif was not able to reconcile the different objectives of the IJI's constituent parties. The largest religious party, Jamaat-i-Islami (JI), abandoned the alliance because of its perception of PML hegemony. The regime was weakened further by the military's suppression of the MQM, which had entered into a coalition with the IJI to contain PPP influence, and allegations of corruption directed at Nawaz Sharif. In April 1993, President Khan, citing "maladministration, corruption, and nepotism" and espousal of political violence, dismissed the Sharif government, but the following month the Pakistan Supreme Court reinstated the National Assembly and the Nawaz Sharif government. Continued tensions between Sharif and Khan resulted in governmental gridlock and the Chief of Army Staff brokered an arrangement under which both the President and the Prime Minister resigned their offices in July 1993.
An interim government, headed by Moeen Qureshi, a former World Bank Vice President, took office with a mandate to hold national and provincial parliamentary elections in October. Despite its brief term, the Qureshi government adopted political, economic, and social reforms that generated considerable domestic support and foreign admiration.
In the October 1993 elections, the PPP won a plurality of seats in the National Assembly and Benazir Bhutto was asked to form a government. However, because it did not acquire a majority in the National Assembly, the PPP's control of the government depended upon the continued support of numerous independent parties, particularly the PML/J. The unfavorable circumstances surrounding PPP rule -- the imperative of preserving a coalition government, the formidable opposition of Nawaz Sharif's PML/N movement, and the insecure provincial administrations -- presented significant difficulties for the government of Prime Minister Bhutto. However, the election of Prime Minister Bhutto's close associate, Farooq Leghari, as President in November 1993 gave her a stronger power base.
In November 1996, President Leghari dismissed the Bhutto government, charging it with corruption, mismanagement of the economy, and implication in extra-judicial killings in Karachi. Elections in February 1997 resulted in an overwhelming victory for the PML/Nawaz, and President Leghari called upon Nawaz Sharif to form a government. In March 1997, with the unanimous support of the National Assembly, Sharif amended the constitution, stripping the President of the power to dismiss the government and making his power to appoint military service chiefs and provincial governors contingent on the "advice" of the Prime Minister. Another amendment prohibited elected members from "floor crossing" or voting against party lines. The Sharif government engaged in a protracted dispute with the judiciary, culminating in the storming of the Supreme Court by ruling party loyalists and the engineered dismissal of the Chief Justice and the resignation of President Leghari in December 1997. The new President elected by Parliament, Rafiq Tarar, was a close associate of the Prime Minister. A one-sided accountability campaign was used to target opposition politicians and critics of the regime. Similarly, the government moved to restrict press criticism and ordered the arrest and beating of prominent journalists.
As domestic criticism of Sharif's administration intensified, Sharif attempted to replace Chief of Army Staff General Pervez Musharraf on October 12, 1999, with a family loyalist, Director General ISI Lt. Gen. Ziauddin. Although General Musharraf was out of the country at the time, the Army moved quickly to depose Sharif. On October 14, 1999, General Musharraf declared a state of emergency and issued the Provisional Constitutional Order (PCO), which suspended the federal and provincial parliaments, held the constitution in abeyance, and designated Musharraf as Chief Executive. While delivering an ambitious seven-point reform agenda, Musharraf has not yet provided a timeline for a return to civilian, democratic rule, although local elections are anticipated at the end of calendar year 2000. Musharraf has appointed a National Security Council, with mixed military/civilian appointees, a civilian Cabinet, and a National Reconstruction Bureau (think tank) to formulate structural reforms. A National Accountability Bureau (NAB), headed by an active duty military officer, is prosecuting those accused of willful default on bank loans and corrupt practices, whose conviction can result in disqualification from political office for twenty-one years. The NAB Ordinance has attracted criticism for holding the accused without charge and, in some instances, access to legal counsel. While military trial courts were not established, on January 26, 2000, the government stipulated that Supreme, High, and Shari'a Court justices should swear allegiance to the Provisional Constitutional Order and the Chief Executive. Approximately 85 percent of justices acquiesced, but a handful of justices were not invited to take the oath and were forcibly retired. Political parties have not been banned, but a couple of dozen ruling party members remain detained, with Sharif and five colleagues facing charges of attempted hijacking.