After the death of Nara Narayan in 1584, Raghu Rai declared independence. The eastern kingdom ruled by Raghu Rai came to be called Koch Hajo and the western Koch Bihar. Soon after the declaration of independence, the two kingdoms started displaying hostilities against each other. Raghu Rai was succeeded by his son Parikshit Narayan and was defeated in 1602 by the army of Nawab of Dhaka (governor for the Mughals) who was moved by Lakshmi Narayan (ruler of Koch Bihar). Parikshit was defeated at Dhubri (now a district in Assam) and sued for peace. But soon, he continued with the hostilities and in 1614 was driven up to Pandu, now in Guwahati. There, Parikshit surrendered and agreed to become a vassal of the Mughal Empire. But before he could take up this assignment he died. The Mughals then appointed Kabisekhar as the kanungo and instructed Sheikh Ibrahim Karori to set up a Mughal system of administration. Parikshit' son Bijit Narayan, was confirmed by the Mughals as 'jamindar' of the area between the river Manas and the Sankosh, and from him the Bijni family descended. The name "Bijni", now a sub-division of Chirang district of Bodoland Territorial Area in Assam, comes from the name of the king Bijit Narayan.