Trịnh Kiểm's 50,000 men pushed into Sơn Nam, but on the Giao Thủy river the Mạc general Nguyễn Quyện, a recent defector, broke the Lê fleet; the Lê lost dozens of officers and Trịnh Kiểm escaped with less than half his army.
Battle
Battle of the Giao Thủy river
- 1557
- Southeast Asia