Toghon and Abachi's main army left Siming and crossed the border, splitting at Lộc Châu toward Chi Lăng and Sơn Động, while a Yunnan column came down the Thao river to Bạch Hạc and Omar's fleet sailed from Qinzhou toward the Bạch Đằng.
Attack
Yuan armies cross into Đại Việt
- 25 December 1287
- Southeast Asia