Ziaur Rahman was born in the village of Bagbari in the
Bogra District of the province of
Bengal (now in northwest Bangladesh), although by some other accounts he was born in the city of
Calcutta. His father, Mansur Rahman, was a
chemist working for a government department in Kolkata. Zia's childhood was divided between living in the village and the city. He was later enrolled into the
Hare School in Kolkata. With the
partition of India in 1947, Mansur Rahman opted to join the new Muslim state of
Pakistan, moving his family to
East Pakistan. The family later moved to
Karachi, the national capital located in
West Pakistan, where Mansur Rahman had been transferred to work for the
Government of Pakistan. Zia was enrolled in the Academy School in Karachi.
Zia spent his adolescent years in Karachi and enrolled in the D. J. College there in 1953. In the same year, he entered the
Pakistan Military Academy in Kakul as an
officer cadet. He was commissioned as a
second lieutenant in the
Pakistan Army in 1955. After serving for two years in Karachi, he was transferred to the
East Bengal Regiment in 1957. From 1959 to 1964 he worked in the department of
military intelligence. In 1960, his marriage was arranged to Khaleda Zia, a young Bengali girl from the
Dinajpur District who was 15 years old. Khaleda Zia remained with her parents in East Pakistan to complete her studies and joined her husband in Karachi in 1965. During the
Indo-Pakistani War of 1965, Zia served in the
Khemkaran sector in
Punjab as the commander of a
company unit of 300–500 soldiers. The sector was the scene of the most intense battles between the rival armies. Zia's unit won one of the highest numbers of gallantry awards for heroic performances.
In 1966, Zia was appointed military instructor at the Pakistan Military Academy, later going on to attend the prestigious
Command and Staff College in
Quetta, where he completed a course in command and tactical warfare. Advocating that the Pakistan Army make greater efforts to recruit and encourage Bengali military officers, Zia helped raise two Bengali
battalions during his stint as instructor. Trained for high-ranking command posts, Zia joined the 2nd East Bengal regiment as its second-in-command at Joydevpur in 1969. Although sectarian tensions between East and West Pakistan were intensifying, Zia travelled to
West Germany to receive advanced military and command training with the
German Army and
NATO.
Zia returned to Pakistan the following year, and witnessed political turmoil and regional division. East Pakistan had been devastated by the
1970 Bhola cyclone, and the population had been embittered by the slow response of the central government. The political conflict between Sheikh Mujibur Rahman's
Awami League, which had won a majority in the 1970 elections, the President
Yahya Khan and West Pakistani politician
Zulfikar Ali Bhutto had brought sectarian tensions to a climax. Sheikh Mujib laid claim to form a government, but Yahya Khan postponed the convening of the legislature under pressure from West Pakistani politicians. Bengali civil and military officers had alleged institutional discrimination through the 1960s, and now distrust had divided the Pakistani Army. Upon his return, Zia attained the rank of
Major and was transferred to the 8th East Bengal regiment stationed in
Chittagong to serve as its second-in-command.