Goryeo was invaded by the Mongols in seven main campaigns through the 1230s until eventually the 1270s, but was hardly ever conquered.[117] Fatigued after decades of fighting, Goryeo sent its crown prince towards the Yuan capital to swear allegiance towards the Mongols; Kublai Khan acknowledged, and married among his daughters https://rafael8up0v.answerblogs.com/34156324/5-simple-statements-about-korea-explained