HELPING THE OTHERS REALIZE THE ADVANTAGES OF KOREA

Goryeo was invaded by the Mongols in seven main campaigns with the 1230s right until the 1270s, but was never conquered.[117] Exhausted following a long time of fighting, Goryeo sent its crown prince on the Yuan cash to swear allegiance into the Mongols; Kublai Khan accepted, and married certainly one of his daughters for the Korean crown prince,[1