Explanation:

The Ahom kingdom was established in 1228 when the first Ahom king Sukaphaa came from Mong Mao and entered the Brahmaputra valley, crossing the rugged Patkai mountain range. He was accompanied by his three queens, two sons, several nobles and officials and their families, and soldiers totaling more than nine thousand persons. He crossed the Patkai and reached Namruk (Namrup) on 2 December 1228 and occupied a region on the south bank with the Burhidihing river in the north, the Dikhau river in the south and the Patkai mountains in the east. He befriended the local groups, the Barahi and the Marans, finally settled his capital at Charaideo and established the offices of the Dangarias— the Burhagohain and the Borgohain.