 The Yuan land army under Toghan and naval fleet under Omar, both already in Đại Việt, were unaware of the loss of their supply fleet.They planned to withdraw from Đại Việt but waited for the supplies to arrive before departing.At the Bạch Đằng River, the Trần prince Trần Hưng Đạo ambushed a Yuan fleet in the second Battle of Bạch Đằng.