Princess Huyền Trân marries King Jaya Simhavarman III of Champa, who cedes the districts of Ô and Lý (around modern Quảng Trị and Huế) to Đại Việt.
Retired emperor Trần Nhân Tông, founder of the Trúc Lâm school of Zen Buddhism, dies on Mount Yên Tử.
Trần Hưng Đạo, commander of Đại Việt's resistance to the Mongol invasions, dies.
Raden Wijaya exploits the Yuan expedition to Java to found Majapahit, the most powerful Hindu-Buddhist empire of the Indonesian archipelago.
Trần Hưng Đạo destroys the Yuan fleet on the Bạch Đằng River, ending the third Mongol invasion of Đại Việt.
Yuan forces under Toghon invade Đại Việt; Trần forces led by Trần Hưng Đạo counter-attack and drive them out.
Historian Lê Văn Hưu completes the Đại Việt sử ký, the first official national history of Vietnam.