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Huailai County

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Tumu Crisis
1449 conflict between the Oirats and the Chinese Ming dynasty
Huailai County
county
Tumubao
Tumubao (), originally named Tongmocheng (統漠城), is a fortress located in Tumu Town, Huailai County, Zhangjiakou, Hebei province, China. It is situated on the inner side of the Great Wall, between Juyongguan and Datong, and is a part of the Great Wall defense system.