The Mughal camp was internally broken due to a quarrel between the Mughal Emperor Shah Alam II and Shuja-ud-Daula the Nawab of Awadh ; Mir Qasim was reluctant to engage the British and went off collecting tribute .
The Mughal forces were drawn from three princely states , whose rulers were Mir Qasim , the Nawab of Bengal , Shuja-ud-Daula the Nawab of Awadh , and the Mughal King Shah Alam II .