Mir Qasim was the Nawab of Bengal from 1760 to 1763. He was installed as Nawab with the support of the 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 winning the Battle of Plassey for the British.
Mir Qasim had aided Kanak Singh with military and arsenals, under the assistance of his army chief Gurgin Khan to fight against the aggression of Gurkha's King. He was badly defeated as the Nepali soldiers had various advantages including terrain, climate, and good leadership.