Kim Heon-chang
Son of Kim Ju-won who, citing his father's lost claim to the throne, rebelled at Ungcheon-ju and proclaimed a state called Jangan
In 822, while governor of Ungcheon Province (Gongju), he rebelled and proclaimed the era name Gyeongun. Mujin, Wansan, Cheong and Sabeol provinces and the secondary capitals Gugwon, Seowon and Geumgwan briefly joined him. When royal troops took his fortress he killed himself, and in 825 his son Kim Beom-mun rebelled again. It is the best-known Late Silla revolt, showing how true-bone struggles for the throne spread to the provinces.