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군 역 사 및 역 사 일 반 군사연구 제130집 223 (Abstract) A study on the military strong-point and the value of Chuncheon city in history - Yoo Jae Choon - When groups generate power and conflict results between groups, the strength of a group is always determined by their military techniques and capabilities. Historically, military aspects have been significant to the survival of a group and are currently significant in understanding the transformations of cities. In studying cities such as that of Chuncheon for example, vital information can be gained from its mountain fortress. One can tell of the military techniques used and their strong points and gain insight into the major historic changes that have occurred in chuncheon city. Including Woodu(牛頭) mountain fortress, Bongui(鳳儀) mountain fortress, Samak(三岳) mountain fortress and Yonghwa(龍華) mountain fortress are known as main military ruins in Chuncheon area. Above mountain fortresses were not operated in the same age. Because different conditions of a location were needed according to the changes of the time, primary mountain fortress was moving throughout the history. The ruins related to Macguk(貊國), a country settled at Chuncheon in ancient times, are ambiguous when considering the nature of the site of trail. And Woodu mountain fortress is regarded as a valuable remain for the investigation of ancient history. It is expected that Woodu mountain fortress was used by the first group settled in Chuncheon. After Silla(新羅) entered into Chuncheon, a considerable change was generated in late 7th century. Silla built Juyang(走壤) mountain fortress(expected to be current Bongui mountain fortress) in Chuncheon because of the vast battle between Silla and Dang(唐). Silla had the capital in South area at that time, but needed more rugged and robust fortress