A SIMPLE KEY FOR KOREA UNVEILED

Goryeo was invaded with the Mongols in 7 main strategies in the 1230s right until the 1270s, but was by no means conquered.[117] Fatigued after a long time of battling, Goryeo sent its crown prince on the Yuan cash to swear allegiance towards the Mongols; Kublai Khan approved, and married one of his daughters for the Korean crown prince,[117] and a