Goryeo under Mongol rule refers to the rule of the Mongol-led Yuan dynasty of China over the Korean Peninsula from about 1270 to 1356. After the Mongol invasions of Korea and the capitulation of the Korean Goryeo dynasty in the 13th century, Goryeo became a semi-autonomous vassal state and compulsory ally of the Yuan dynasty for about 80 years. The ruling line of Goryeo, the House of Wang, was permitted to rule Korea as a vassal of the Yuan, which established the Zhengdong Province (征東行省; literally "Conquering the East") in Korea. Members of the Goryeo royal family were taken to Dadu, and typically married to spouses from the Yuan imperial house. As a result, princes who became monarchs of Goryeo during this period were effectively imperial sons in-law ("khuregen"). Yuan overlordship ended in the 1350s when the Yuan dynasty itself started to crumble and King Gongmin of Goryeo began to push the Yuan garrisons back.