Explanation:

Susenghphaa (also Pratap Singha), was the 17th and one of the most prominent kings of the Ahom kingdom. As he was advanced in years when he became king, he is also called the burha Raja (Old king). His reign saw an expansion of the Ahom kingdom to the west, the beginning of the Ahom-Mughal conflicts, and a reorganization of the kingdom with an expanded Paik system and reoriented village economy designed by Momai Tamuli Borbarua. His expansion to the west is underlined by the two new offices that he created: that of the Borbarua and the Borphukan. The alliances he formed with the rulers of Koch Hajo resulted in formation that successfully thwarted Mughal expansion. The administrative structure that he created survived till the end of the Ahom kingdom in 1826.