Korean–Jurchen border conflicts

The Korean–Jurchen border conflicts were a series of conflicts from the 10th century to the 17th century between the Korean states of Goryeo and Joseon and the Jurchen people. == Background == In 993, the land between the border of Liao and Goryeo was occupied by troublesome Jurchen tribes, but the Goryeo diplomat Sŏ Hŭi was able to negotiate with Liao and obtain that land up to the Yalu River, citing that in the past it belonged to Goguryeo, the predecessor to Goryeo.

Source: Wikipedia — Korean–Jurchen border conflicts (CC BY-SA 4.0)