gung ho is derived from the sunny king of ancient Korea known as Gung Ye. When europeans came to visit they picked up on the emporer Gung Ye as mame. Upon returning to europe they used it whenever excited and it change into Gung Ho
The exact date of GungYe's birth is unknown, but history records that GungYe was a son of King Heonan or of King Gyeongmun; his mother was a servant of the king who was beloved by the king.
GungYe was born in traditional Asian holiday of Dano; and the soothsayer prophesied that the baby born on Dano would bring disaster to the nation, and the court officials and royal family members urged to the king to get rid of the evil infant.
Some scholars explain GungYe's self-proclamation as Buddha as an attempt to strengthen his power, since he, as a royal family member of Silla, had no influence over powerful local landlords and merchants, so he tried to use the power of religion in order to keep his rule, which did not prove to be effective.
Major rebellion forces were led by GungYe (궁예弓裔, ?~918), Gi Hwon (기훤), Yang Gil (양길) and Gyeon Hwon (견훤).
Two new kingdoms were established: Hugoguryeo (후고구려, Later Goguryeo, later renamed Taebong (태봉)) by GungYe, and Hubaekje (후백제, later Baekje) by Gyeonhwon.
Wanggeon (왕건), who was a lord of Songak (present-day Gaeseong), joined Taebong but overthrew GungYe and established Goryeo in 918.