Goryeo was invaded from 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 to the Yuan capital to swear allegiance towards the Mongols; Kublai Khan accepted, and married among his daughters https://collin3nn0x.rimmablog.com/33086409/korea-secrets