Goryeo was invaded from the Mongols in seven key strategies from the 1230s till the 1270s, but was in no way conquered.[117] Fatigued immediately after many years of battling, Goryeo sent its crown prince towards the Yuan money to swear allegiance for the Mongols; Kublai Khan approved, and married considered one of his daughters into the Korean crown prince,[117] as well as dynastic line of Goryeo continued to survive 파라곤 under the overlordship of the Mongol Yuan dynasty as being a semi-autonomous vassal state and compulsory ally.
This was the first time an performing president were impeached given that South Korea turned a democracy.