5 SIMPLE TECHNIQUES FOR KOREA

Goryeo was invaded through the Mongols in seven key strategies within the 1230s till the 1270s, but was in no way conquered.[117] Exhausted soon after many years of battling, Goryeo despatched its crown prince into the Yuan capital to swear allegiance to the Mongols; Kublai Khan accepted, and married among his daughters for the Korean crown prince,