 The Mughals got the necessary pretext for war and an imperial army was at once detached in 1615 under the command of Abu Bakr and Raja Satrajit of Bhusna.The imperial army advanced towards Barnagar, the old capital of Kamrup and next moved to Hajo and numerous outposts were raised in the surrounding region.In November 1615, Abu Bakr suddenly fell upon Kajali, the Ahom frontier post on the southwest.