The Kamarupa Palas in Northeastern India

Kamarupa, a region roughly spanning areas of present-day Northeast India, Bihar, West Bengal, Bhutan, northern Bangladesh and Sylhet, comes under the control of a Hindu branch of the Pala dynasty. By this point, the area has become a crossroads of trade routes between Tibet, China and the Gangetic Plains, and has seen the rule of three dynasties, including the Varmans (fourth century CE) and the Mlechchhas (seventh century CE). 

The rulers of Kamarupa assume it to be the mythical kingdom of Pragjyotisha, and claim lineage accordingly from Narakasura, who is believed to have established the Bhauma dynasty that ruled Pragjyotisha before the fourth century. There is, however, no evidence of the existence of such a kingdom or its ruling house.