Goryeo Centralization Reform

Timeline

1. 1009Gaegyeong · KoreaAfter Mokjong was killed in a palace coup, Hyeonjong acceded to the throne with weak royal power and aristocratic military dominance; meanwhile the Liao pressed the borders, and Goryeo urgently needed to integrate domestic affairs and strengthen central control over military and finances.
2. 1009Provinces across the Korean Peninsula · Korean PeninsulaThe court adjusted appointments of Six Armies generals, reclaimed military power for centrally dispatched commanders, standardized official evaluations in prefectures and commanderies, and unified the land-tax collection system, weakening local magnates' power to raise troops and withhold taxes at will.
3. 1009–1010Gaegyeong · KoreaThe reform enhanced central military-civilian coordination capacity, providing an institutional foundation for organized resistance during the Liao invasion the following year. The centralizing trend continued under Hyeonjong, and aristocratic power was somewhat curbed.