Bạch Đằng River
Tran Thai Tong’s successors Tran Thanh Tong (r. 1258–1278) and Tran Nhan Tong (r. 1278–1293) continued to send tribute to the new Mongol-led Yuan dynasty. In 1283, Yuan emperor Kublai Khan launched the invasion of Champa. In early 1285 he commissioned prince Toghon to led the second invasion of Dai Viet to punish the Vietnamese king Tran Nhan Tong for not helping the Yuan campaign in Champa and refusing to send tribute. Kublai also appointed Tran Ich Tac, a Tran prince dissent as the puppet king of Dai Viet. Yuan forces though initially captured Hanoi, however, were defeated by Cham–Vietnamese alliance in June. In 1288 they decided to launch the third and also the largest invasion of Dai Viet but were repelled. Prince Tran Quoc Tuan ended the Mongol yokes through an decisive naval victory in the battle of Bạch Đằng River in April 1288. Dai Viet continued to flourish under the reigns of Tran Nhan Tong and Tran Anh Tong (r. 1293–1314).