NOT KNOWN FACTS ABOUT KOREA

Goryeo was invaded through the Mongols in seven big strategies from the 1230s till the 1270s, but was in no way conquered.[117] Fatigued immediately after many years of battling, Goryeo sent its crown prince towards the Yuan money to swear allegiance for the Mongols; Kublai Khan acknowledged, and married one among his daughters to your Korean crown