Goryeo was invaded from the Mongols in seven main campaigns through the 1230s until eventually the 1270s, but was never conquered.[117] Exhausted following decades of combating, Goryeo sent its crown prince for the Yuan funds to swear allegiance on the Mongols; Kublai Khan approved, and married considered one of his https://edwin3ll0z.blogs-service.com/64835866/not-known-facts-about-korea