His father,
Gojong of Goryeo, sent Wonjong when he was the Crown Prince, to meet with
Kublai Khan to negotiate with the Mongols after decades of warfare during the
Mongol invasions of Korea. During this time, Kublai was in the middle of a power struggle with
Ariq Böke whom was residing in Karakorum while Kublai himself was participating in the
Chinese Campaign. Having the Goryeo crown prince come before him to concede after decades of fighting, Kublai Khan was jubilant and said "Goryeo is a country that long ago even
Tang Taizong personally campaigned against but was unable to defeat. But now, its crown prince has come before me, and this be the will of heaven as it is!" ==Reign==