Lam Sơn uprising: Lam Sơn rebels emerge victorious against the Ming army in the Battle of Tốt Động - Chúc Động taking place in Đông Quan, in now Hanoi.
The Lam Sơn uprising (Chinese: 藍山起義; Vietnamese: Khởi nghĩa Lam Sơn) was a nationalist rebellion led by Lê Lợi in the province of Jiaozhi from 1418 to 1427 against the occupation of Vietnam by Ming China.