Gyeon Hwon, king and founder of Hubaekjek,…

Gyeon Hwon, king and founder of Hubaekjek, had changed the state's name to Majin in 904, and eventually to Taebong in 911; he had also transferred the capital from Songak to Cheorwon in 905.

Taebong at its peak consists of territory in the present-day provinces North Hwanghae and South Hwanghae, Gyeonggi, Gangwon-do (South Korea)/Kangwon-do (North Korea), Pyongyang, North Chungcheong and southern part of South Jeolla.

In his later reign, Gung Ye had proclaimed himself a Buddha and become a tyrant who sentenced death to anyone opposing him, including his own wife Lady Gang.

As a result, in 918 four of his own generals—Hong Yu, Bae Hyeon-gyeong, Shin Sung-gyeom and Bok Ji-gyeom—overthrow Taebong and install Wang Geon as king, Soon thereafter, the Goryeo dynasty is proclaimed, from which the name Korea derives.