Cika wannan magana: A karni na 9, Silla ta kafa sansani a tsibirin don yaki da fashin teku. Kwamandan su, Wang Geon, ya kafa martabarsa ta soja a sansanin soja, kuma daga baya ya ci gaba da kafa Masarautar Goryeo. A karni na 13, kotun Goryeo ta nemi mafaka a tsibirin yayin da sojojin Mongol
sun mamaye shi a 1232. Bayan da Goryeo ya mika wuya ga Mongols, manyan dakarun da ke tsibirin suka tashi, suka fara tawaye na Sambyeolcho.