Goryeo was invaded because of the Mongols in 7 important strategies from the 1230s till the 1270s, but was in no way conquered.[117] Exhausted right after a long time of preventing, Goryeo despatched its crown prince on the Yuan funds to swear allegiance on the Mongols; Kublai Khan approved, and https://ricardo3mm0z.verybigblog.com/33150721/facts-about-korea-revealed