Goryeo was invaded via the Mongols in 7 main 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 for the Mongols; Kublai Khan approved, and married one among his daughters https://trenton9zv3c.bloggerchest.com/33856350/not-known-facts-about-korea