HELPING THE OTHERS REALIZE THE ADVANTAGES OF KOREA

Goryeo was invaded with the Mongols in seven key strategies within the 1230s until the 1270s, but was in no way conquered.[117] Exhausted soon after many years of fighting, Goryeo sent its crown prince into the Yuan cash to swear allegiance to the Mongols; Kublai Khan accepted, and married certainly one of his daughters for the Korean crown prince,