A new constitution promulgated by Ayub in 1962 ended the period of martial law. The new, 156-member National Assembly was elected that year by an electoral college of 120,000 Basic Democrats from the union councils. After the legislative elections political parties were again legalized. Ayub created the Pakistan Muslim League (PML) as the official government party. The presidential election of January 1965, also determined by electoral college rather than direct vote, resulted in a victory for Ayub, although opposition parties were allowed to participate.
Ayub was skillful in maintaining cordial relations with the United States, stimulating substantial economic and military aid to Pakistan. This relationship deteriorated in 1965, when another war with India broke out over Kashmir. The United States then suspended military and economic aid to both countries. The USSR intervened to mediate the conflict, inviting Ayub and Prime Minister Lal Bahadur Shastri of India to meet in Toshkent (Tashkent). By the terms of the so-called Toshkent Agreement of January 1966, the two countries withdrew their forces to prewar positions and restored diplomatic, economic, and trade relations. Exchange programs were initiated, and the flow of capital goods to Pakistan increased greatly.
The Toshkent Agreement and the Kashmir war, however, generated frustration among the people and resentment against President Ayub. Foreign Minister Zulfikar Ali Bhutto, who opposed Pakistan's capitulation, resigned his position and founded the Pakistan People's Party (PPP) in opposition to the Ayub regime. Ayub tried unsuccessfully to make amends, and amid mounting public protests he declared martial law and resigned in March 1969. Instead of transferring power to the speaker of the National Assembly, as the constitution dictated, he handed it over to the commander in chief of the army, General Agha Muhammad Yahya Khan, who was the designated martial-law administrator. Yahya then assumed the presidency.
Yahya Regime
In an attempt to make his martial-law regime more acceptable, Yahya dismissed almost 300 senior civil servants and identified 32 families that were said to control about half of Pakistan's gross national product. To curb their power Yahya issued an ordinance against monopolies and restrictive trade practices in 1970. He also committed to the return of constitutional government and announced the country would hold its first general election on the basis of universal adult franchise in late 1970.
Yahya determined that representation in the National Assembly would be based on population. In July 1970 he abolished the One Unit, thereby restoring the original four provinces in West Pakistan. As a result, East Pakistan emerged as the largest province of the country, while in West Pakistan the province of Punjab emerged as the dominant province. East Pakistan was allocated 162 seats in the 300-seat National Assembly, and the provinces of West Pakistan were allocated a total of 138.
Civil War
The election campaign intensified divisions between East and West Pakistan. A challenge to Pakistan's unity emerged in East Pakistan when Sheikh Mujibur Rahman (“Mujib”), leader of the Awami League, insisted on a federation under which East Pakistan would be virtually independent. He envisaged a federal government that would deal with defense and foreign affairs only; even the currencies would be different, although freely convertible.
Mujib's program had great appeal for many East Pakistanis, and in the December 1970 election called by Yahya, he won by a landslide in East Pakistan, capturing 160 seats in the National Assembly. Bhutto's Pakistan People's Party (PPP) emerged as the largest party in West Pakistan, capturing 81 seats (predominantly in Punjab and Sind). This gave the Awami League an absolute majority in the National Assembly, a turn of events that was considered unacceptable by political interests in West Pakistan because of the divided political climate of the country. The Awami League adopted an uncompromising stance, however, and negotiations between the various sides became deadlocked.
Suspecting Mujib of secessionist politics, Yahya in March 1971 postponed indefinitely the convening of the National Assembly. Mujib in return accused Yahya of collusion with Bhutto and established a virtually independent government in East Pakistan. Yahya opened negotiations with Mujib in Dhaka in mid-March, but the effort soon failed. Meanwhile Pakistan's army went into action against Mujib's civilian followers, who demanded that East Pakistan become independent as the nation of Bangladesh.
There were many casualties during the ensuing military operations in East Pakistan, as the Pakistani army attacked the poorly armed population. India claimed that nearly 10 million Bengali refugees crossed its borders, and stories of West Pakistani atrocities abounded. The Awami League leaders took refuge in Calcutta (now Kolkata) and established a government in exile. India finally intervened on December 3, 1971, and the Pakistani army surrendered 13 days later. East Pakistan declared its independence as Bangladesh.
Yahya resigned, and on December 20 Bhutto was inaugurated as president and chief martial law administrator of a truncated Pakistan. Mujib became the first prime minister of Bangladesh in January 1972. When the Commonwealth of Nations admitted Bangladesh later that year, Pakistan withdrew its membership, not to return until 1989. However, the Bhutto government gave diplomatic recognition to Bangladesh in 1974.
The Bhutto Government
Under Bhutto's leadership Pakistan began to rearrange its national life. Bhutto nationalized the basic industries, insurance companies, domestically owned banks, and schools and colleges. He also instituted land reforms that benefited tenants and middle-class farmers. He removed the armed forces from the process of decision making, but to placate the generals he allocated about 6 percent of the gross national product to defense. In July 1972 Bhutto negotiated the Simla Agreement, which confirmed a line of control dividing Kashmir and prompted the withdrawal of Indian troops from Pakistani territory.
In April 1972 Bhutto lifted martial law and convened the National Assembly, which consisted of members elected from West Pakistan in 1970. After much political debate, the legislature drafted the country's third constitution, which was promulgated on August 14, 1973. It changed the National Assembly into a two-chamber legislature, with a Senate as the upper house and a National Assembly as the lower house. It designated the prime minister as the most powerful government official, but it also set up a formal parliamentary system in which the executive was responsible to the legislature. Bhutto became prime minister, and Fazal Elahi Chaudry replaced him as president.
Although discontented, the military grudgingly accepted the supremacy of the civilian leadership. Bhutto embarked on ambitious nationalization programs and land reforms, which he called “Islamic socialism.” His reforms achieved some success but earned him the enmity of the entrepreneurial and capitalist class. In addition, religious leaders considered them to be un-Islamic. Unable to deal constructively with the opposition, he became heavy-handed in his rule. In the general elections of 1977, nine opposition parties united in the Pakistan National Alliance (PNA) to run against Bhutto's PPP. Losing in three of the four provinces, the PNA alleged that Bhutto had rigged the vote. The PNA boycotted the provincial elections a few days later and organized demonstrations throughout the country that lasted for six weeks.
Zia Regime
The PPP and PNA leadership proved incapable of resolving the deadlock, and the army chief of staff, General Muhammad Zia ul-Haq, staged a coup on July 5, 1977, and imposed another martial-law regime. Bhutto was tried for authorizing the murder of a political opponent and found guilty; he was hanged on April 4, 1979. The PPP was reorganized under the leadership of his daughter, Benazir Bhutto. Zia formally assumed the presidency in 1978 and embarked on an Islamization program. Through various ordinances between 1978 and 1985, he instituted the Islamization of Pakistan's legal and economic systems and social order. In 1979 a federal Sharia (Islamic law) court was established to exercise Islamic judicial review. Other ordinances established interest-free banking and provided maximum penalties for adultery, defamation, theft, and consumption of alcohol.