 On receiving Firoz Khan's letter the Ahom king made up his mind to fight.On Thursday, Bhadra 3, 1589 "saka" near aboutAugust 20, 1667, the Ahom army started from the capital and sailed down the Brahmaputra in two divisions.They encamped at Kaliabor, the Vice Regal headquarters, from where they conducted their war operations against the Mughals.