In 757, Gyeongdeok of Silla classified the island as "Geoje-gun" "" (Geoje county). Modern Geoje is classified as a "si" () (city). In 1170, Uijong of Goryeo secretly escaped to Geoje when Jeong Jung-bu raised a rebellion against him, instating his brother, Myeongjong as king. Geoje served as a strategic location in preparation of the naval forces for the Gihae Eastern Expedition () of Tsushima Island in 1419 by the Korean general Yi Jong Mu. At the time of the Seven-Year War in 1592, admiral Yi Sun-sin gained a great naval victory against Japanese invaders near the town of Okpo in Geoje. Since then. Yi was referred to by his noble title, "Chung Mu Gong," which roughly translates into English as "Earner of Great National Respect."