Lạng Giang

Lạng Giang lies on the route between the northern frontier and the Red River delta. Under Ming rule, the fortified town of Xương Giang served as a seat of administration on the road from Guangxi towards Đông Quan. Its position made it an important obstacle to the Lam Sơn forces fighting to restore Đại Việt.

In 1427 the rebels besieged and captured Xương Giang before a Ming relief army arrived from the north. After the death of its commander Liu Sheng at Chi Lăng, the remaining troops continued south, only to be surrounded and defeated near Xương Giang. The campaign cut off the expected reinforcement of the garrison at Đông Quan and helped bring the long uprising to victory.

The later city of Bắc Giang lies here.