六朝时期,我国南北对峙、皇朝迭更,战乱频仍是这一时代的特点。其时,江东政权为了达到抗御外侮、稳定政局、偏安东南的目的,遂以建康为中心,扬州为根本,建立起一批军事重镇。本文从地理环境着手,结合当时的政治、军事形势,择要阐述六朝重要军镇的分布及其对保卫首都的作用。一 During the six dynasties, the confrontation between our country and the south and the dynasty were reversed, and the war was still a frequent feature of this era. At that time, in order to achieve the goal of resisting foreign aggression, stabilizing political situation and southeastern part of the province, the Jiangdong regime set up a number of military centers centered on Jiankang and Yangzhou. This article starts from the geographical environment and combines with the current political and military situations. It is necessary to explain the distribution of important military towns and the role of defending the capital in the Six Dynasties. one