Siege of Đông Quan
1418 CE.
Shown on the map at 21.024°, 105.841°.
The Lam Sơn uprising was a rebellion against Ming China led by Vietnamese leader Lê Lợi. The uprising began in early 1418 and ended in late 1427 with the victory of the Lam Sơn rebels, the retreat of the Ming army after the Đông Quan oath, and the establishment of the Later Lê dynasty. In 1407, the Ming dynasty annexed the entire territory of Đại Ngu, the short-lived state ruled by the Hồ dynasty in what is now northern Vietnam and established the province of Jiaozhi. Their rule was met with resistance from the Viet people due to the Yongle Emperor's vigorous Sinicization policy, which aimed to assimilate the Viet. This policy caused widespread dissatisfaction and led to a series of uprisings across Jiaozhi, both large and small. After suppressing these uprisings, the Ming dynasty's rule became more stable than ever, but in some areas, there remained a latent risk of rebellion, particularly in the mountainous region of Thanh-Nghệ (modern Thanh Hóa and Nghệ An provinces), where the people were not willing to submit like those in the Kinh lộ region (the lowland Red River Delta). In 1418, Lê Lợi raised an army in Lam Sơn, a rural mountainous area in today's Thanh Hóa province.
Text from the Wikipedia article Lam Sơn uprising, licensed CC BY-SA 4.0.