THE SMART TRICK OF KOREA THAT NO ONE IS DISCUSSING

Goryeo was invaded through the Mongols in 7 big strategies from the 1230s till the 1270s, but was never ever conquered.[117] Fatigued immediately after many years of battling, Goryeo sent its crown prince to the Yuan capital to swear allegiance for the Mongols; Kublai Khan acknowledged, and married one among his daughters to your Korean crown princ