The Bangladesh Liberation War (Muktijuddho) was the armed struggle, lasting from 26 March to 16 December 1971, through which East Pakistan won independence from Pakistan as the sovereign People's Republic of Bangladesh. Its roots lay in the structural inequities of the two-wing Pakistani state created by the 1947 Partition: economic exploitation of the eastern wing, the denial of Bengali as a state language (the 1952 Language Movement), and the West's refusal to honour the verdict of the December 1970 general election, in which Sheikh Mujibur Rahman's Awami League won 167 of 169 East Pakistan seats and an absolute National Assembly majority. When President Yahya Khan indefinitely postponed the Assembly session on 1 March 1971, mass civil disobedience followed, crystallised in Mujib's 7 March Racecourse Ground speech. The Pakistan Army launched Operation Searchlight on the night of 25–26 March 1971, triggering the proclamation of independence and the war.
The conflict combined a guerrilla insurgency with a humanitarian catastrophe. The Mukti Bahini (liberation forces), drawn from defecting Bengali soldiers, the East Pakistan Rifles, police and volunteers, waged guerrilla warfare organised into eleven sectors under sector commanders coordinated by General M. A. G. Osmani. A government-in-exile, the Mujibnagar Government, was sworn in on 17 April 1971 at Baidyanathtala (Mujibnagar), with Mujib as President (in absentia, imprisoned in West Pakistan), Syed Nazrul Islam as acting President and Tajuddin Ahmad as Prime Minister. The Pakistan Army and collaborator militias (Razakar, Al-Badr, Al-Shams) perpetrated systematic atrocities, including a targeted killing of Bengali intellectuals on 14 December 1971; roughly ten million refugees fled to India. India signed the Indo-Soviet Treaty of Peace and Friendship in August 1971 and, after Pakistani air strikes on 3 December, entered the war openly.
The joint command of Indian forces and the Mukti Bahini, under Lieutenant General Jagjit Singh Aurora, compelled the surrender of Pakistan's Eastern Command at the Ramna Race Course, Dhaka, on 16 December 1971, where General A. A. K. Niazi signed the Instrument of Surrender, yielding some 93,000 prisoners of war. The 1972 Simla Agreement between Indira Gandhi and Zulfikar Ali Bhutto normalised relations, and the 1974 tripartite Delhi Agreement settled the POW repatriation. In Bangladesh, the International Crimes Tribunal, constituted in 2010, has tried collaborators for 1971 war crimes; as of 2026 commemoration of the Bijoy Dibosh (Victory Day, 16 December) and Shaheed Dibosh remains central to national identity, though the war's memory is periodically politicised.
For the BCS Bangladesh Affairs paper, this is foundational and high-yield. Examiners test exact dates (7 March speech, 25–26 March Operation Searchlight, 26 March Independence Day, 17 April Mujibnagar, 16 December Victory Day), the sector commander structure, the Mujibnagar Government's composition, the role of India and the Indo-Soviet treaty, and the gallantry awards (Bir Sreshtho, the seven highest honours). Candidates should connect the war to the constitutional preamble's founding principles and to post-war state-building and transitional justice.
Example
On 16 December 1971, Lieutenant General A. A. K. Niazi signed the Instrument of Surrender at the Ramna Race Course in Dhaka, handing over about 93,000 Pakistani troops to the joint India–Mukti Bahini command under Lt Gen Jagjit Singh Aurora.
Frequently asked questions
It began on the night of 25–26 March 1971 with the Pakistan Army's Operation Searchlight and the proclamation of independence, and ended on 16 December 1971 with the surrender of Pakistan's Eastern Command at Dhaka. The war lasted roughly nine months.