In June 1425 Đinh Lễ went north to win over the Thanh Hóa countryside, routed the Ming at Diễn Châu and chased them to Tây Đô, which was left isolated; by July Lam Sơn held Thanh Hóa, Diễn Châu and Nghệ An.
Siege
Đinh Lễ's advance on Diễn Châu and Tây Đô
- 1425
- Southeast Asia