 He was also appointed Parbatia Phukan.This appointment caused bitter resentment among the hereditary Ahom nobles and commanders and the resistance which they offered to the invaders was neither worthy of the efficient military organisation of the Ahoms nor of the reputation which they acquired by repeated success in their enterprises against foreigners, and Mir Jumla's march into Assam was an uninterrupted series of triumph and victories through the real secret of his success, namely, defection in Ahom camp, which has not been touched upon by any historian of the expedition.The Ahoms, however, recovered their senses when the hostile force reached the neighbourhood of Kaliabor.