The Sambyeolcho Rebellion (1270–1273) was a Korean rebellion against the Goryeo dynasty that happened at the last stage of the Mongol invasions of Korea. It was suppressed by Goryeo and the Yuan dynasty. After the rebellion, Goryeo became a vassal state of the Yuan dynasty. After 1270 Goryeo became a semi-autonomous client state of the Yuan dynasty. The Mongols and the Kingdom of Goryeo tied with marriages and Goryeo became quda (marriage alliance) vassal of the Yuan dynasty for about 80 years and monarchs of Goryeo were mainly imperial sons in-law (khuregen). The two nations became intertwined for 80 years as all subsequent Korean kings married Mongol princesses.