General who created the Byeolmuban army and built the Nine Forts after defeating the Jurchens
After a defeat by the Jurchen cavalry in 1104, he proposed the Byeolmuban, made up of a cavalry corps, an infantry corps and a corps of warrior monks. In 1107 he led 170,000 men of the Byeolmuban against the Jurchen and built the Nine Forts in the northeast, but they were returned in 1109 because of repeated Jurchen requests and the difficulty of defending them.
Outmatched by Jurchen cavalry, Goryeo formed the Byeolmuban, a special army of cavalry, infantry and warrior monks, on Yun Gwan’s advice.
Yun Gwan led 170,000 men of the Byeolmuban against the Jurchens and built nine forts in the northeast, but they were handed back after little more than a year.
Fifteenth king of Goryeo, who minted coins such as Haedong tongbo and created the Byeolmuban army
Sixteenth king of Goryeo, who sent Yun Gwan to build the Nine Forts and revived state schooling
The age when the civil-minded Song bought peace from Liao, Western Xia and Jin while the lower Yangtze boomed and Neo-Confucianism took shape, and the Ming, having driven out the Yuan, rebuilt the East Asian order through imperial autocracy, the sea ban and tribute — as Japan passed through the Kamakura and Muromachi warrior governments into the Warring States era, and Korea from Goryeo to Joseon
From the Nine Oath Banners to the Two Armies and Six Guards, the Five Commands and garrison system, the Five Army Camps and the Board of Marshals — armies rebuilt at every crisis