Northern Fortification of Goryeo

Timeline

1. 1198Gaeseong · GoryeoIn light of conditions on the northern frontier, the Goryeo court ordered all regions to strengthen defense preparations, designated key sections for fortification and repair, and allocated manpower and materials.
2. 1198Northern Pyeongannam-do frontier · Northern frontierLocal troops and civilians built and repaired fortresses, passes, and beacon fires along the northern frontier, forming a more continuous defensive system to monitor northern movements and delay any potential invasion.