The Cambridge History of India, Vol. IV: The Mughul Period v4.c18.46

v4.c18.46

About the same time peace was effected on the north-eastern frontier in Assam, where constant bickering and incursions had taken place during the previous century. The north of Assam was occupied by two groups of Mongoloid origin calling themselves respectively Koch and Āhom. Intervention by the Muslims in Bengal had taken place sometimes merely by way of aggression and sometimes when invited by the Koch either through internal faction or as helpers against the Āhom. During Jahāngīr’s reign the Mughuls had obtained a footing as far east as the Bar Nadī on the border between the present districts of Darrang and Kāmrūp. The Āhoms were embroiled by a cousin of the Koch ruler who had taken refuge with them, and foray and counter-raid continued for some years. In 1635 the Mughuls after several defeats made a last stand at Hājo, which fell, and the Āhoms took the country west of the Bar Nadī. A fresh Mughul expedition in 1637 was successful and the rebel Koch was killed. By the peace established in the following year the imperial boundary on the Bar Nadī was again restored.