Later Three Kingdoms
In the late 9th century, when Mungyeong was a part of the Sangju district of Silla, a man from Gaeun-eup (then Gaseon-hyeon) named Ajagae fomented a local peasant rebellion which seized the fortress of Sangju. The man's son, Gyeon Hwon, who was also probably born in Gaeun, ruled the kingdom of Hubaekje during the Later Three Kingdoms period.