Further, certain parts of Assam were historically part of Bengal. The three Barak Valley districts of Cachar, Hailakandi and Karimganj were once part of Sylhet district, which, though historically part of undivided Bengal, was tagged with Assam by the British, before being again tagged with East Pakistan in 1947. While the Sylhet district was given to East Pakistan, the three Barak Valley districts remained with Assam. Similarly, Goalpara was once part of Bengal, before being tagged with Assam. (Dhubri was once part of Goalpara). And as there was a close cultural affinity and historical connection between people on both sides of the new political divide, cross-border migration continued. Actually, immigration from former East Bengal (then East Pakistan and now Bangladesh) to the Northeast is not a post 1971 phenomenon, but a historical legacy.