元史
The Eastern Route army set sail first from Korea on 22 May and attacked Tsushima on 9 June and Iki Island on 14 June. According to the "History of Yuan", the Japanese commander Shōni Suketoki and Ryūzōji Suetoki led forces in the tens of thousands against the invasion force. The expeditionary forces discharged their firearms, and the Japanese were routed, with Suketoki killed in the process. More than 300 islanders were killed. The soldiers sought out the children and killed them as well. However, the "History of Yuan" merges events in June with the later battle in July, when Shōni Suketoki actually fell in battle.