Mongol Preparations for Overtures to Japan via Goryeo (1246)

Timeline

1. 1246Qoduo Aral · Mongolian PlateauÖgedei's eldest son Güyük ascended as great khan at the kurultai in 1246, ending Töregene's regency. Güyük inherited Ögedei's eastern policies, continuing to demand that Goryeo relocate and restore its capital, send hostages, and supply manpower for Mongol eastern campaigns, laying the political groundwork for later using Goryeo as an intermediary to contact Japan.
2. 1246–1247Hwanghae North Province · Korean PeninsulaGüyük dispatched Amukan with a fourth expeditionary force into Goryeo, punishing it for failing to send envoys to congratulate his accession and for refusing to relocate and restore its capital. Mongol forces plundered the northern frontier and western regions and conscripted Goryeo manpower. Goryeo was forced to contend with the Mongols under military pressure; Kublai's later demand that Goryeo guide envoys to Japan traces its origins to this period's comprehensive suzerainty claims over Goryeo.