Jeong Jung-bu (1106 – 18 October 1179) was a medieval Korean soldier and military dictator during the Goryeo Dynasty (918–1392). He was a career soldier, qualified on military part of civil service examination. He was most noted for leading a coup d'état in 1170 (Revolt of military officers), dethroning the king and beginning of 100-year military reign in Korea. Early career Jeong was born in 1106; he learned martial arts and military tactics in his early days. He was often reported to be 7-foot-tall giant with great confidence and intelligence. He was a diligent soldier, and his loyalty earned him the trust from the king. He went through a slow promotion and later became Chief of General Staff. At the time he became a soldier, the Goryeo Dynasty had a policy that put the civilian power over military. The policy benefited the dynasty well during its early days, and many civilian officials were also able military commanders, such as Gang Gam-chan and Yoon Gwan. However, the civilian rule made many side-effects as time passed on; the military generals was seen as servants, or even slaves of the civilian officials, and treated as slaves by many government officials and advisers to the king. In 998, King Mokjong put military under civilian command, causing the coup d'état of General Gang Jo. In 1014, military officers were not paid because the government had to pay civilian officials first, causing the anger of Generals Choi Jil and Kim Hoon to attempt a failed military rebellion; and later the government even closed the military academy. The grief of army officers became greater and greater as the treatment and view toward them got harsher. Coup In 1167, during the royal banquet of King Uijong, Kim Don-jung, son of powerful aristocrat Kim Bu-sik (author of Samguk Sagi), burned Jeong's long beard with a candle, and made fun of him and also mocked the whole military. The incident caused Jeong to have a strong animosity toward aristocrats and civilian officials. In 1170, King Uijong went to his royal villa to rest and to hold another feast, and he also held a martial arts competition. A young soldier won the event, and was praised by the king. Then, many of king's advisers to the court and eunuchs forced General Yi So-eung, who was at his late fifties, to face the champion, who was about 20. The old general, of