Goryeo was invaded through the Mongols in 7 key strategies within the 1230s right until the 1270s, but was by no means conquered.[117] Exhausted right after a long time of combating, Goryeo sent its crown prince for the Yuan funds to swear allegiance on the Mongols; Kublai Khan approved, and https://waylon3mm0y.onzeblog.com/33968043/not-known-details-about-korea