First conflict in the Goryeo–Khitan War

The First Goryeo-Khitan War was a 10th-century conflict between the kingdom of Goryeo and Khitan forces near what is now the border between China and North Korea. It occurred in 993 and was the first of the Goryeo-Khitan Wars, which were continued with the Second Goryeo-Khitan War (1010) and Third Goryeo-Khitan War (1018).

In 993, the Khitan invaded Goryeo's northwest border with 60,000 troops. The Khitan withdrew and ceded territory to the east of the Yalu River when Goryeo agreed to end its alliance with Song China. However, Goryeo continued to communicate with Song, having strengthened its position by building fortresses in the newly gained northern territories.