Everything about Pyeongtaek
Goryeo was invaded because of the Mongols in 7 big strategies from the 1230s till the 1270s, but was in no way conquered.[116] Fatigued just after decades of battling, Goryeo despatched its crown prince to the Yuan capital to swear allegiance towards the Mongols; Kublai Khan accepted, and married certainly one of his daughters for the Korean crown