The first violent outbreak connected with the rising of 1857 took place at Barrackpur near Calcutta. The greased cartridges had excited misapprehensions in the minds of the Sepoys and they regarded their introduction as an open attack on their religion. 1857 Mangal Pande, a sepoy of the 34the Bengal Native Infantry, stationed at Barrackpur attacked European officers. He was overcome, Disarming of Sepoys at Barrackpur court martialled and hanged. Ishwari Pande, Jamadar of the Guard on duty, who had not apprehended Mangal Pandey, was also hanged. The Sepoys were suspected of treason and many regiments of the Bengal Army were disarmed and disbanded.