Mezue ahịrịokwu na-esonụ: Mgbe Silla dasịrị, Taejo nke Goryeo guzobere isi obodo alaeze ya na Kaesŏng, nke dị ugbu a n'ebe ugwu nke Mpaghara Na-enweghị Agha. N'oge
Mgbe ndị Mongoli wakporo Korea na narị afọ nke iri na abụọ, oche gọọmentị gbanwere nwa oge gaa Ganghwa Island, ugbu a na ndịda DMZ na Incheon obodo ukwu, ebe a na-egbochi mwakpo ndị agha mmiri nke Mongol ruo ihe dị ka afọ iri tupu eze ahụ enyefee onwe ya iji kwụsị igbu ọchụ nke ndị Mongol mere na peninsula, iji rata eze ahụ.