The 1971 War Creates Bangladesh
A brutal nine-month war splits Pakistan in two and sends millions of refugees into India
Quick facts
- War began
- 25 March 1971 (West Pakistani invasion of the east)
- Duration
- Nine months
- Deaths (estimate range)
- 500,000 to over 3 million
- Outcome
- Bangladesh created, 16 December 1971
What happened
In 1971 West and East Pakistan fought in the Bangladesh Liberation War. On 25 March 1971 the West Pakistani army invaded East Pakistan, trying to stop protests over political and linguistic domination by the west. The brutal war that followed lasted for nine months, and millions of refugees fled to neighbouring India, which eventually intervened militarily on the side of the Bengali independence forces. The National Archives records that estimates for the total number of civilian and military deaths range from 500,000 to over 3 million. West Pakistan surrendered on 16 December 1971, leading to the creation of Bangladesh.
Why it matters
The 1971 war redrew the map of South Asia, turning East Pakistan into independent Bangladesh and confirming India as the dominant regional power. The refugee crisis that drove India's intervention, and the mass killings in East Pakistan, rank among the largest humanitarian catastrophes of the era.
How we know
The war, the refugee flows, and the range of casualty estimates are documented by the UK National Archives, which notes the wide disagreement over the death toll, from 500,000 to over 3 million.
Sources
- The National Archives (UK). The Independence of Bangladesh in 1971 · Primary source (author-declared)nationalarchives.gov.uk · Cited as a "primary" source (no stronger domain match). · Link is live and its text matches the event's key terms (Jul 2026)
- U.S. Department of State, Office of the Historian. The South Asia Crisis and the Founding of Bangladesh, 1971 · Primary source (author-declared)history.state.gov · Cited as a "primary" source (no stronger domain match). · Link is live and its text matches the event's key terms (Jul 2026)
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