After rising to the throne, he began to reform and expand the military of Korea; first he removed Kim Ja-jeom, who had corrupted politics and had greater power than the king himself.
Setelah naik takhta, ia mulai mereformasi dan mengembangkan militer Korea; pertama-tama ia menyingkirkan Kim Ja-jeom, yang korup di dalam politik dan memiliki kekuasaan yang melebihi raja itu sendiri.