Even after the fall of Baekje against the allied forces of the Tang Dynasty of China and Silla (Korea) in 660, the period of King Uija, he gathered the old retainers of the Baekje army and resisted them for regaining the former capital of Baekje, Sabi Castle (present Buyeo County, Chungcheongnam Province).
義慈王時代の660年、唐と新羅の連合軍によって百済が滅亡した後も、旧臣らを糾合して抵抗運動を続け、百済の故都である泗沘城（現・忠清南道扶余郡）の奪還を試みた。