Goryeo
1107년전쟁
Yun Gwan's Special Forces and the Nine Fortresses of the Northeast
Yun Gwan led the specially formed Byeolmuban military unit to subjugate the Jurchen and built nine fortresses in the northeastern frontier region.
Key developments
- 별무반 편성Formation of Byeolmuban
On Yun Gwan's recommendation, the special cavalry force Byeolmuban was organized to prepare for the campaign against the Jurchen.
- 1107년 원정Jurchen Expedition
Yun Gwan led the Byeolmuban to defeat the Jurchen and occupy northeastern territories.
- 9성 축조Construction of the Nine Northeastern Fortresses
Nine fortresses were built in the occupied territory to expand Goryeo's domain.
- 9성 반환Return of the Nine Fortresses
Following Jurchen requests, Goryeo returned the nine northeastern fortresses.