NOT KNOWN DETAILS ABOUT KOREA

Goryeo was invaded by the Mongols in seven main strategies with the 1230s right until the 1270s, but was by no means conquered.[117] Exhausted right after a long time of preventing, Goryeo despatched its crown prince into the Yuan cash to swear allegiance to the Mongols; Kublai Khan accepted, and married among his daughters for the Korean crown pri