1388), also written as Nahacu, was a Mongol leader and general of the Northern Yuan dynasty in Manchuria, which was under Liaoyang province of the former Yuan dynasty. Originally a Yuan official, he had won hegemony over the Mongol tribes in a wide area including much of Rehe (Jehol) and Liaoning by the mid-1380s. Now he grew strong in the northeast, with forces large enough (numbering hundreds of thousands) to threaten invasion of the newly founded Ming dynasty in order to restore the Mongols to power in China.