The Koch Bihar-Mughal alliance defeated Raghudev in May 1597, but in the same year Raghudev was able to recoup his losses with the help of Isa Khan. Isa Khan died in 1599, driving Raghudev to seek an alliance with the Ahom kingdom. Raghudev offered his daughter Mangaldoi to Prataap Singha in 1602/1603, and the Ahom king accepted on the possibility of using Raghudev as a buffer against the Mughals. But this did not happen because Raghudev died within a few days after the marriage between Pratap Singha and Mangaldoi.