NOT KNOWN DETAILS ABOUT KOREA

Goryeo was invaded through the Mongols in seven big campaigns within the 1230s right up until the 1270s, but was by no means conquered.[117] Exhausted just after decades of preventing, Goryeo sent its crown prince to your Yuan money to swear allegiance to the Mongols; Kublai Khan approved, and married one of his daughters to your Korean crown princ