Goryeo was invaded through the Mongols in 7 key strategies within the 1230s 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 to https://dallas3op2c.like-blogs.com/33730952/korea-options