明长城九边重镇防御体系分布图说

明长城是继秦始皇修筑的万里长城以来，历史上又一次伟大的长城防御工程。明朝将长城沿线划分为九个防区进行防御，即九边重镇。该文在大量史料及现场调研的基础上绘制了九边重镇防御体系图，根据此图逐步介绍长城九边重镇的设防，及九镇所辖的路城、卫城、所城、堡城的分布情况，最后概括了防御体系的遗存现状。

Illustration on the Defense System Distribution of the Nine Important Defense Areas in the Great Wall of Ming Dynasty

The Great Wall of Ming Dynasty is another great defense project in Chinese history except the Great Wall during Qin Shihuang times. There are nine defense areas along The Great Wail in Ming Dynasty, which is the famous Nine Important Defense Areas. In this dissertation we protract a defensesystem picture about this areas depending on a large number of historical materials and on-the-spot investigation. According to these pictures, we will introduce the fortification of the Nine Important Defense Areas gradually and analyze the Lu city, Wei city, Suo city and Bao city all governed by the Nine Important Defense Areas. Finally we also summarize the reJics of the defense system.