Goryeo was invaded from the Mongols in seven main strategies with the 1230s right until the 1270s, but was never conquered.[117] Exhausted following decades of combating, Goryeo sent its crown prince for the Yuan money to swear allegiance on the Mongols; Kublai Khan approved, and married one among his daughters https://emiliano1fe7t.anchor-blog.com/14252805/how-korea-can-save-you-time-stress-and-money