Goryeo was invaded because of the Mongols in 7 major campaigns from your 1230s until eventually the 1270s, but was in no way conquered.[117] Exhausted right after decades of combating, Goryeo despatched its crown prince towards the Yuan cash to swear allegiance into the Mongols; Kublai Khan approved, and married one among his daughters to your Korean crown prince,[117] and the dynastic line of Goryeo continued to outlive underneath the overlordship on the Mongol Yuan dynasty as a semi-autonomous vassal state and compulsory ally.
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