ABOUT KOREA

Goryeo was invaded by the Mongols in seven big campaigns through the 1230s till the 1270s, but was under no circumstances conquered.[117] Fatigued soon after a long time of combating, Goryeo despatched its crown prince to the Yuan cash to swear allegiance on the Mongols; Kublai Khan approved, and married considered one of his daughters for the Kore