契丹“镇东海口长城”位置新探

Location of the Great Wall of Zhendong Haikou at the Beginning of the Khitan Regime

契丹于耶律阿保机称汗次年在“镇东海口”筑长城。该长城是契丹占据辽河下游平原后,在辽河以东构筑的军事驻防工程,为的是防范来自辽东半岛及其毗邻区的军事威胁,为契丹集中力量防御渤海和用兵西南解除后顾之忧。该长城是契丹在7世纪高句丽千里长城西南近海段的基础上修筑的,南起今辽宁省营口市老边区柳树镇前岗子村,向北延伸至鞍山市海城市牛庄镇,长近百里。契丹灭渤海后,疆域南逾鸭绿江,该长城因军事价值下降而逐渐废弃。

The Great Wall at the Zhendong Haikou(镇东海口)was built in 908 AD under the reign of Yelv Abaoji(耶律阿保机). This part of the Great Wall was a military engineering constructed in the east of the Liao River after the Khitan occupied the plain of the lower Liao River course. And it was used for preventing potential military threats from the Liaodong Peninsula and its adjacent region, defending the Bohai(渤海)state intensively and dispatching armies to the southwestern orientation. The Great Wall of Zhendong Haikou was built on the basis of the southwest offshore section of the Great Wall that built by the Goguryeo people in the 7th century. It started in the village of Liushu Town(柳树镇)of Yingkou City and extended northward about 100 miles to Niuzhuang Town(牛庄镇)of Haicheng City. After the Khitan conquered the Bohai state, the territory of Khitan state extended to the Yalu River, and the military value of the Great Wall declined rapidly and the Great Wall was gradually abandoned.