The Partition of Bengal in 1947, also known as the Second Partition of Bengal, part of the Partition of India, divided the British Indian Bengal Province along the Radcliffe Line between the Dominion of India and the Dominion of Pakistan. The Bengali Hindu-majority West Bengal became a state of India, and the Bengali Muslim-majority East Bengal (now Bangladesh) became a province of Pakistan.
On 20 June 1947, the Bengal Legislative Assembly met to decide the future of the Bengal Province, as between being a United Bengal within India or Pakistan or divided into West Bengal and East Bengal as the homelands for the Bengali Hindus and the Bengali Muslims, respectively. At the preliminary joint session, the assembly decided by 126–90 that if it remained united, it should join the new Constituent Assembly of Pakistan. Later, a separate meeting of legislators from West Bengal decided by 58–21 that the province should be partitioned and that West Bengal should join the existing Constituent Assembly of India. In another separate meeting of legislators from East Bengal, it was decided by 106–35 that the province should not be partitioned and by 107–34 that East Bengal should join Pakistan in the event of Partition.