Also called Dokseongsanseong, Doksanseong Fortress was where General Gwon Yul stationed twenty thousand soldiers from Jeolla-do against the Japanese soldiers in the 26th year of the reign of King Seonjo (1593) and mowed down a great number of the enemy’s forces and prevented the fortress from being captured by the enemy. It was not clear when Doksanseong Fortress was built, but it was likely constructed during the Baekje Period, serving as a strategic point of troops in the Unified Silla Period and Goryeo Period. People erected the fortress in the 27th year of the reign of King Seonjo, and Byeon Eung-seong modified it in the 35th year of the reign of King Seonjo (1602) after the Japanese Invasion ended. It was repaired in the 16th and 20th years of the reign of King Jeongjo, and again in 1792 and 1796. It had circumference of 3,240 meters and 4 gates, but the lack of water in the fortress had been considered a great demerit. In relation to this demerit, according to the legend of Semadae, the Japanese enemies thought that there was an abundant supply of water in the fortress when General Gwon Yul led a white horse and pretended to wash it with rice, so the Japanese forces withdrew.