《史记·七十列传·淮南衡山列传》
秦皇派蒙恬修筑长城，东西绵延数千里，长年戍边、风餐露宿的士兵常常有数十万人，死者不可胜数，僵尸暴野千里，流血遍及百亩，百姓气力耗尽，想造反的十家有五。
遣蒙恬筑长城，东西数千里，暴兵露师常数十万，死者不可胜数，僵尸千里，流血顷亩，百姓力竭，欲为乱者十家而五。
Emperor Qin sent Meng Tian to build the Great Wall, which stretched for thousands of miles from east to west. There were often hundreds of thousands of soldiers guarding the border all year round and sleeping outdoors. The number of deaths was countless. Corpses were exposed in the wilderness for thousands of miles, and blood was spilled over hundreds of acres. Exhausted, five out of ten families wanted to rebel.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 遣蒙恬筑长城，东西数千里，暴兵露师常数十万，死者不可胜数，僵尸千里，流血顷亩，百姓力竭，欲为乱者十家而五。 [/INST] Emperor Qin sent Meng Tian to build the Great Wall, which stretched for thousands of miles from east to west. There were often hundreds of thousands of soldiers guarding the border all year round and sleeping outdoors. The number of deaths was countless. Corpses were exposed in the wilderness for thousands of miles, and blood was spilled over hundreds of acres. Exhausted, five out of ten families wanted to rebel.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 遣蒙恬筑长城，东西数千里，暴兵露师常数十万，死者不可胜数，僵尸千里，流血顷亩，百姓力竭，欲为乱者十家而五。
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Emperor Qin sent Meng Tian to build the Great Wall, which stretched for thousands of miles from east to west. There were often hundreds of thousands of soldiers guarding the border all year round and sleeping outdoors. The number of deaths was countless. Corpses were exposed in the wilderness for thousands of miles, and blood was spilled over hundreds of acres. Exhausted, five out of ten families wanted to rebel.
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