A Study on the Location of the Paegang-Jangseong in Silla

Various studies have been presented on the process of Silla's northward advance and the installation of the Paegang-jin(浿江鎭). However, there are still parts that have not been clearly identified, such as the timing of the installation of 14 county and county prefectures, the location of the Paegang-jin, and the relationship of the Janggu-jin(長口鎭). The same is true of the location of the Paegang-Jangseong(浿江長城), which was constructed in 826 during the process of Silla's northward advance. Silla's advance into the northwest border was largely carried out in two places: inland and coastal. Silla built an inland defense line by building the Paegang-Jangseong as a result of the development of inland transportation routes, and made the Janggu-jin a maritime base as a result of the development of coastal transportation routes. The topography and transportation routes of the 9th century when the Paegang-Jangseong was constructed looked different from today. The Geukseong(棘城) area that started the Paegang-Jangseong was bordered by the inland sea the Jeliang-hae(濟梁海) to the west. At that time, the main transportation routes were the Jabi-ryeong (慈悲嶺) and Suan(遂安) area. The Paegang-Jangseong was connected by waterway from the Jeliang-hae to the mouth of the Daedong River(大同江) to the west, and from The Geukseong to the Goksan(谷山) to the east along the mountain range.