In 554, he met the Baekje armies at Gwansanseong Fortress (present-day Okcheon, South Korea), killing King Seong and four of his ministers, and taking some 29,000 prisoners.
In the year 554, he clashed with Baekje troops at Gwansanseong Fortress (now known as Okcheon in South Korea). He killed King Seong along with four ministers, and secured around 29,000 prisoners.