
King who allied Goryeo with the Mongols.
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As a prince, Wonjong was sent as a hostage to the Mongol court to secure peace after Goryeo's submission. He spent several years in Mongolia, learning Mongol customs and forming ties with the imperial family.
Wonjong became king with Mongol support, marking the beginning of direct Mongol influence over Goryeo's throne. He agreed to pay tribute, provide troops, and accept Mongol oversight in exchange for peace.
Wonjong, with Mongol military aid, crushed the Sambyeolcho (Three Elite Patrols) rebellion, which opposed the peace with the Mongols. The rebels were defeated on Jeju Island, ending the last major military resistance to Mongol domination.
Wonjong arranged the marriage of his son (future King Chungnyeol) to a Mongol princess, Kublai Khan's daughter. This established a pattern of intermarriage that tied the Goryeo royal family to the Mongol Yuan dynasty.
See how Wonjong of Goryeo stacks up against other historical figures