United Bengal is a political ideology for a unified Bengali-speaking nation in South Asia. The ideology developed among Bengali nationalists after the first partition of Bengal in 1905. The British-ruled Bengal Presidency was divided into Western Bengal and Eastern Bengal and Assam to weaken the Bengali nationalist movement; after much protest, Bengal was reunited in 1911 .
In 1947 United Bengal proposal was the bid made by the Bengali Prime Minister Huseyn Shaheed Suhrawardy and nationalist leader Sarat Chandra Bose to found a united and independent nation-state of Bengal. It sought to prevent the division of Bengal on religious grounds. A confessionalist political system was mooted. The proposal was not put up for a vote. The British government proceeded to partition Bengal in accordance with the Mountbatten Plan and Radcliffe Line.The initiative failed owing to British diplomacy and communal conflict between Muslims and Hindus that eventually led to the second partition of Bengal .