Injong of Goryeo (29 October 1109 – 10 April 1146) (r. 1122–1146) was the 17th monarch of the Korean Goryeo dynasty. He was the eldest son of King Yejong and Queen Sundeok, the daughter of Yi Ja-gyeom. His reign saw two major internal crises that nearly ended the House of Wang, the collapse of the Northern Song dynasty, and the establishment of the Jin dynasty as the dominant power in the East Asia. Background Domestic Injong ascended the throne in accordance with the third of the Ten Injunctions of Taejo, as “the eldest legitimate royal issue." Despite the reverend status of this document, its succession rules were often disregarded. As recent as in 1095 Injong's grandfather King Sukjong came to power after abdication of his nephew. At the age of twelve and a half Injong's succession became possible largely due to the influence of his maternal grandfather Yi Ja-gyeom, while according to the report of the Song envoy Xu Jing, Injong's uncle Prince Po, supported by the Han An-in faction, "had designs on [the throne]" International By the early 1122 the Khitan state of Liao was effectively destroyed by the armies of Taizu of Jin. Large number of Khitans fled to Goryeo. Operations of Song against Khitan were unsuccessful, and the lost Song territories south of the Great Wall were recovered only after the Jurchen victory over Liao. The 1123 treaty formalized the superior status of Jin: the annual tribute of Song was set to 200,000 taels of silver and 200,000 bolts of silk. Despite the weak performance against Khitan, the Song government overestimated both the importance of the recovery of Yanjing (a modern-day Beijing) and its own military capabilities. 1122–1126: Yi Ja-gyeom years 1122–1123 The early years of Injong's reign were dominated by Yi Ja-gyeom. As the Supreme Chancellor (munha sijung, junior first rank) at the head of combined Secretariat-Chancellery (chungseo munha-seong) Yi Ja-gyeom was the highest-ranking government official. His dominance was challenged during the last years of Yejong, but with the beginning of his grandson's reign Yi Ja-gyeom took decisive steps to buttress it. By the end of 1122 Princes Po and Hye were exiled, Han An-in assassinated, and several hundred of his followers, including a dozen core members of Tanju Han and Cheongan Im clans, were either banished or demoted. During this period officers of the Royal Army began to play an important role in the domestic