It did kill 400,000 people, but the army should be only about 65,438+10,000, and the rest are civilian workers. In ancient wars, many civilian workers were generally recruited as handymen, and later these people were counted as Zhao Jun. However, even civilian workers were young and middle-aged people of Zhao. After the battle, there were few soldiers left in Zhao. In the end, the country with the strongest combat power among the original seven countries was greatly weakened and finally eliminated. As for why Leitian framed Zhao Jun, he had to kill him. 400,000 prisoners are definitely an untimely bomb, and unrest may occur at any time, resulting in uncontrollable consequences. And these people can't let go. If they let go, they will be enemies in the future. Qin doesn't know how much it will cost to beat them again. Then there is the inability to support them. It turns out that the supply of these people is borne by Zhao. Now that they are captured, Zhao will definitely not provide them with food, and Qin has 400,000 more people at once. The daily food problem is enough to scare off a bunch of people with extremely backward productivity, so the best way is to kill all these people, so all the troubles will be gone. Xiang Yu was the same in the future, and the soldiers of Qin were also killed by him.