Trần Thánh Tông

Trần Thánh Tông (Trần Hoảng; 1240–1290) was the second emperor of the Trần dynasty, ruling Đại Việt from 1258 to 1278. As crown prince he witnessed the Mongol invasion of 1257, after which his father Thái Tông enthroned him and governed as retired emperor until 1277.

He abdicated in 1278 for his son Trần Khâm (Nhân Tông), and as retired emperor the two were supreme commanders against the two Yuan invasions.

After defeats in 1285 they won at Hàm Tử and Chương Dương and retook Thăng Long, and in 1288 the Yuan fleet was destroyed at Bạch Đằng. He died in 1290.