NOT KNOWN FACTS ABOUT KOREA

Goryeo was invaded because of the Mongols in 7 major campaigns from your 1230s right up until the 1270s, but was under no circumstances conquered.[117] Fatigued after decades of fighting, Goryeo despatched its crown prince to your Yuan cash to swear allegiance into the Mongols; Kublai Khan recognized, and married one of his daughters towards the Ko