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阴山-河套平原防御区是匈奴与西汉朝廷反复争夺的特殊地带。由于其战略重要性,阴山-河套平原区域各级城池防御体系较完备,防御分区最为密集。加之该地区人类活动相对较少、气候较干燥,利于城址的保存,因此可以作为研究西汉长城防御体系的典型。研究表明,阴山-河套平原地区的西汉长城防御体系是一个多层次的网络状结构,其体系结构与其功能相关。整个防御体系纵深层层增加,功能复合性层层递进。防御过程由外而内,扩张过程由内而外,既可以抵御游牧民族南下侵扰,又可作为西汉开疆拓土的助力。
Yinshan - Hetao Plain defense area is the Hun and Western Han Dynasty court repeatedly competing for the special zone. Because of its strategic importance, Yinshan - Hetao plain at all levels of the city’s defense system is more complete, the most intensive defense zoning. In addition, the human activities in this area are relatively few and the climate is drier and conducive to the preservation of the city site. Therefore, it can be used as a model for studying the defense system of the Great Wall in the Western Han Dynasty. The research shows that the Western Han Dynasty Great Wall defense system in Yinshan-Hetao Plain is a multi-level network-like structure whose architecture is related to its function. The whole defense system has been increased in depth and the functional composite layers have progressed. The defense process is from the outside to the inside, and the process of expansion is from the inside to the outside. It can resist the nomadic invasion of nomadic people and help boost the pioneering land in the Western Han Dynasty.