Goryeo was invaded through the Mongols in seven key 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 funds to swear allegiance on the Mongols; Kublai Khan approved, and married one among his daughters https://emiliano8uo0w.blog-gold.com/43036362/detailed-notes-on-korea