Mir Qasim (also spelt Mir Kasim; full name:Mir Kasim Ali Khan) (died May 8, 1777) was the Nawab of Bengal from 1760 to 1763. He was installed as Nawab with the support of British East India Company replacing Mir Jafar, his father-in-law, who had himself been supported earlier by the East India Company after his role in the Battle of Plassey. However, Mir Jafar was in conflict with the East India company over too many demands and tried to tie up with the Dutch East India Company. The British eventually overran the Dutch forces at Chinsura and played a major role in replacing Mir Jafar with Mir Qasim. Qasim later fell out with the British and fought them at the Battle of Buxar. His defeat has been suggested as the last real chance of preventing a gradual British expansion in large parts of North East India following Britain' s victory in the Seven Years War.