Borbarua was one of the five patra mantris (councillors) in the Ahom kingdom, a position created by the Ahom kingPrataap Singha. The position included both executive and judicial powers, with jurisdiction of the Ahom kingdom east of Kaliabor river and those regions not governed by the three great Gohains, Burhagohain, Borgohain and the Borpatrogohain. The region to the west of Kaliabor was governed by the Borphukan. The Ahom Kingdom (1228-1826) was established by Sukaphaa, a Tai prince from Mong Mao, in the upper reaches of the Brahmaputra river, between the extant Chutiya kingdom in the north and the Kachari kingdom in the south. ... The Ahom Dynasty ruled parts of Assam for nearly 600 years, from the thirteenth century to the nineteenth century. ... Borphukan was one of the five patra mantris (councillors) in the Ahom kingdom, a position that was created by the Ahom king Prataap Singha. ...