Doksanseong Fortress - Osan Air Base

M Updated
Doksanseong Fortress
East Gate of Doksanseong  Fortress
Aerial Vew of  Doksanseong  Fortress

City Listings

City Listing Category

Geographical Address

Duty Station (or best approximation)
Public Address
155 Jigot-dong, Osan-si, Gyeonggi-do, South Korea

Contact Info

+82 31-8036-7602
Operating Hours
Open 24 hours

Doksanseong Fortress (禿山城) was built during the Baekje period and has a circumference of 1,100m.

In the 25th year of King Seonjo (1592) during the Imjin War, General Kwon Yul, a Jeolla patrol officer, was stationed in Doksanseong, defeated tens of thousands of Japanese soldiers and defended the fortress so that allies could move north to Gyeonggi.

Currently, there is Semadaeji (洗山臺址), National Historic Site No. 140, in the fortress. According to “Hwaseongji,” the Japanese army discovered that Doksanseong was running out of water and besieged the fortress. There is a record that the Japanese soldiers pretended to wash with rice, so they were tricked by the abundance of water and retreated, and later called the place Semadae.

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.


Semadae lookout

Doksanseong Fortress - Gyeonggi medical korea