FACTS ABOUT KOREA REVEALED

Goryeo was invaded by the Mongols in seven major campaigns within the 1230s right up until the 1270s, but was never conquered.[117] Exhausted just after decades of preventing, Goryeo sent its crown prince on the Yuan cash to swear allegiance towards the Mongols; Kublai Khan approved, and married one of his daughters on the Korean crown prince,[117]