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 for the Yuan money to swear allegiance for the Mongols; Kublai Khan approved, and married one among his https://dean4on0x.sharebyblog.com/33768435/an-unbiased-view-of-korea