Formation of Political group in Upper Yeongsan River Area and establishment of Baekje County

The upper Yeongsan River area has a basin topography, so it is effective for archaeological analysis. In this area, Bronze Age dwellings and tombs are investigated, but the distribution density of remains is not very high. The sites rapidly increased from around the 3rd century and gradually spread throughout the upper Yeongsan River area. The Three Kingdoms Period's tombs are overwhelmingly concentrated in the Yeongsan River Mainstream area, while the dolmen is relatively abundant in the Jeungamcheon and Oryecheon areas. It is highly likely that the population group of the Bronze Age continued to the Three Kingdoms Period as the distribution area of the dolmens and the tombs overlap in the Jeungamcheon area. However, it is thought that a new population group was introduced during the Three Kingdoms period because there are not many dolmens in the rest of the region and it is also different from the distribution area of the ancient tombs. Baekje is known to have installed Chujahye County, Yulji County, and Gulji County in the upper Yeongsan River areas. According to the results of the analysis of the distribution density and tombs of the Bronze Age and Three Kingdims period's, Gulji-hyeon(county) is thought to have been located in Goseo and Changpyeong, and the center of Yulji County is thought to have been between the location of Geumseong and the northeast of Downtown Damyang. And it is estimated that the center of Chujahye County was the site of Taemok-ri, Damyang. Therefore, if there was a small state of Mahan in the upper Yeongsan River areas, it is likely to have been located in the Taemok-ri site, in the mainstream of the Yeongsan River, and Baekje would have established Chujahye county based on this area. It is understood that after reunification, Silla moved the center of Chujahye to the current Downtown Damyang area and changed its name to Chuseong.