Nonsan area was incoporated into the Baekje form the Baekje earthenware of in Hansung period era and consolidated completely to the Baekje. Nonsan area is located at the southern-central area of Chungcheongnam-do, and border counties are Buyeo, Gongju, and Iksan. Also, it is at the cross point of Mt. Gyeryong and Mt. Daedun, so its geography is a natural defense fortification. Nonsan area is a rice production area and near the West sea, so it is a economically affluent and can contact China and its culture. The Baekje transferred its capital from Wungjin(Gongju) to Sabi(Buyeo) for national restoration because Gongju was too narrow to be a capital. After transferring its capital, Nonsan area became an area which should be defended to protect the capita. Sabi. During the period of the Baekje collapse. it was Nonsan area where Kae-Back and suicide squad of the 5,000 men and fought bravely with general kim Yusin with 50,000 soldiers of Silla. Like this, Nonsan area became a strategic location of the army after transferring the capital. thus, Baekje build many Mountain Fortresses at Nonsan area after transferring the capital.