要说南京城墙的军事作用,必须要先谈谈城墙的历史。南京的城墙大部分是明城墙,但在明城墙之前,最早可以追溯到吴王夫差在冶城山建冶城始,迄今已2500年。周元王四年,越大夫范蠡在中华门外长干里筑越城,成为建南京城垣之始。等到东汉建安十六年,吴国孙权迁至南京,在石头山金陵邑原址依山筑城,取名石头城,并据此扼守长江险要,当时的长江水就在石头城墙下。由此可见,城墙最重要的作用就 To say that the military role of the Nanjing city wall, we must first talk about the history of the city wall. Most of the city walls of Nanjing are Ming City Wall, but before the Ming City Wall, the earliest date can be traced back to Wu Wangfu in the city of Metallurgical built since the beginning, so far has been 2500 years. Zhou Yuan Wang four years, the more the husband Fan Li Zhong door in the dry building in the city, became the beginning of Nanjing city wall. Wait until the Eastern Han Jian Jian sixteen years, Wu Kwok Sun Quan moved to Nanjing, in the original site of the Stone Mountain Jinling Yicheng fortified city, named Stone City, and thus guarding the Yangtze River insurmountable, when the Yangtze River water in the stone wall. This shows that the most important role of the city wall