Goryeo was invaded through the Mongols in seven key strategies with the 1230s right until the 1270s, but was never conquered.[117] Exhausted following decades of combating, Goryeo sent its crown prince for the Yuan money to swear allegiance on the Mongols; Kublai Khan approved, and married one among his daughters https://titus0zu2a.blogdeazar.com/34102397/how-korea-can-save-you-time-stress-and-money