 It ended with the Ahom influence extended to the Manas river which remained the western boundary of the kingdom till the advent of the British in 1826.The Ahoms migrated from present-day Myanmar to the Brahmaputra valley in the 13th-century.They settled in with the locals initially and created a new state; and in the 16th-century they vastly expanded their power and territory by occupying the Chutiya kingdom in Upper Assam, removing the Baro-Bhuyan confederacy in Nagaon and Darrang, and pushing the Dimasa kingdom further south.