大同镇
大同镇-
文章首先了解了该地区军事地理环境，介绍明长城及大同镇的设立背景。
The article first to understand the military geography of the region , the Great Wall and the Ming Datong described the establishment of the background .
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又根据败虎堡内碑刻遗存分析大同镇的区域历史，并考证了堡内永宁碑的立碑时间。
Thirdly , according to the inscriptions remains in the Baihu Fort , it analyses the regional history of Datong town and identifies the building time of " Yongning monument " in the Fort .