1958 Pakistani coup d'état in the context of Ayub Khan

East Pakistan was the eastern province of Pakistan between 1956 and 1971, restructured and renamed from the province of East Bengal and covering the territory of the modern country of Bangladesh. Its land borders were with India and Burma, with a coastline on the Bay of Bengal. To distinguish this region from India's state West Bengal (which is also known as "Indian Bengal"), East Pakistan was known as "Pakistani Bengal". East Pakistanis were popularly known as "Pakistani Bengalis". In 1971, East Pakistan became the newly independent state Bangladesh, which means "country of Bengal" or "country of Bengalis" or "land of Bengalis" in the Bengali language. In standard meaning, "desh" refers to a country, but in Bangla local expressions, "desh" also means one's village or countryside, hometown, ancestral heritage, homeland, and they do not have to be a politically formed sovereign country.

East Pakistan was formed with West Pakistan at the reorganization of One Unit Scheme orchestrated by the 3rd prime minister of Pakistan, Mohammad Ali. The Constitution of Pakistan of 1956 replaced the Pakistani monarchy with an Islamic republic. Bengali politician H.S. Suhrawardy served as the Prime Minister of Pakistan between 1956 and 1957 and a Bengali bureaucrat Iskander Mirza became the first President of Pakistan. The 1958 Pakistani coup d'état brought general Ayub Khan to power. Khan replaced Mirza as president and launched a crackdown against pro-democracy leaders. Khan enacted the Constitution of Pakistan of 1962 which ended universal suffrage. By 1966, Sheikh Mujibur Rahman emerged as the preeminent opposition leader in Pakistan and launched the six-point movement for autonomy and democracy. The 1969 uprising in East Pakistan contributed to Ayub Khan's overthrow. Another general, Yahya Khan, usurped the presidency and enacted martial law. In 1970, Yahya Khan organised Pakistan's first federal general election. The Awami League emerged as the single largest party, followed by the Pakistan Peoples Party. The military junta stalled in accepting the results, leading to civil disobedience, the Bangladesh Liberation War, 1971 Bangladesh genocide and persecution of Biharis.

The Constitution of 1956 was the fundamental law of Pakistan from March 1956 until the 1958 Pakistani coup d'état. It was the first constitution adopted by independent Pakistan. There were 234 articles, 13 parts and 6 schedules.

Field Marshal Mohammad Ayub Khan NPk HJ HPk MBE LoM (14 May 1907 – 19 April 1974) was a Pakistani army officer and military dictator who served as the second president of Pakistan from 1958 until his resignation in 1969. He was the first native commander-in-chief of the Pakistan Army, serving from 1951 to 1958. Ayub Khan's presidency started in 1958 when he overthrew President Iskander Mirza in a coup d'état, and ended in 1969 when he resigned amid mass protests and strikes across the country.

Born in the North-West Frontier Province, Ayub Khan was educated from the Aligarh Muslim University and trained at the Royal Military College, Sandhurst. He fought in the Second World War on the British side against the Imperial Japanese Army. After the Partition of British India in August 1947, he joined the Pakistan Army and was posted in East Bengal. In 1951, he became the first native commander-in-chief, succeeding General Gracey. From 1953 to 1958, he served in the civilian government as Defence and Home Minister and supported President Iskandar Ali Mirza's decision to impose martial law against prime minister Feroz Khan Noon's administration on 7 October 1958. Three weeks later, Ayub Khan seized the presidency in a military coup, the first in the country's history.