Goryeo was invaded via the Mongols in seven key campaigns through the 1230s right until the 1270s, but was never conquered.[117] Exhausted following decades of combating, Goryeo sent its crown prince for the Yuan funds to swear allegiance on the Mongols; Kublai Khan recognized, and married one of his daughters https://charlie6oi8q.snack-blog.com/33895907/the-smart-trick-of-korea-that-no-one-is-discussing