Where did the "Three Legions" go during the Qin Dynasty chaos?

After Qin Shihuang unified the world, the Qin Dynasty supported nearly one million troops, which were mainly divided into three legions: Lingnan Legion, Great Wall Legion and Guanzhong Legion. In fact, Zhou Wen, the Ministry of Chen Sheng, also temporarily set up a captive legion, with a total of four legions. In 2 18 BC, the lingnan legion, Qin Shihuang, ordered Tu Youyou and Zhao Tuo to lead a 500,000-strong army, and for the first time, hundreds of troops marched south. As a result, the commander was killed and nearly100000 soldiers were killed. After two years of preparation, Qin Shihuang again ordered Ren Tao and Zhao Tuo to attack Baiyue in AD 2 14. This time, it won a great victory, conquered Baiyue, and kept 500,000 Qin Jun in the local area through immigration and garrison.

At the end of Qin Dynasty, there was a peasant uprising, and the world was in chaos. While Lingnan is remote, Ren Tao and Zhao Tuo negotiated to separate Lingnan, but they did not completely control the army and the place. Among the troops and localities, there are officials placed by Qin Shihuang in Lingnan counties. In 208 BC, when Ren Tao died of illness, Zhao Tuo took the opportunity to kill Qin officials, planted his cronies, and ordered the army to block the entrance to Lingnan to prevent the war from spreading to Lingnan. Since then, Zhao Tuo formed a separatist force, and did not participate in the northern rescue of Qin, as well as all the officers in the north who were interested in saving Qin. From 2 14 BC to 2 13 BC, Qin Shihuang ordered the general Meng Tian to lead 300,000 troops to attack the Xiongnu in the north. The Huns were defeated and moved northward. Qin Jun recovered most of Henan and Hetao and established Jiuyuan County (now Baotou, Inner Mongolia). In order to prevent the Huns from going south again, Meng Tian sent 300,000 soldiers to northern Xinjiang and recruited a large number of people to build the Great Wall to resist tarquin.

After Meng Tian was killed by Zhao Gao and Qin Ershi, Wang Li became the commander-in-chief of the Great Wall Corps. In the peasant uprising at the end of Qin Dynasty, Qin Ershi mobilized Wang Li and led 200,000 Qin Jun to counter the rebellion in the south. Finally, in the Battle of Julu, the Great Wall Corps was completely annihilated, some were killed, some surrendered, and some fled. The 654.38+million people who stayed at the Great Wall either fled the farmland or surrendered to the rebels, and the Great Wall Corps was destroyed. Guanzhong Legion This is the central garrison of the Qin Dynasty, responsible for the defense of Xianyang and Guanzhong areas in Beijing. The total strength of the Guanzhong Legion is about 200,000, and the general is Zhao Ben. However, more than 654.38 million of them were transferred by Zhang Han and enriched into the ranks of prisoners of war. Zhao Ben led the army to fight with Liu Bang in Kaifeng, Luoyang and Guanzhong, but Zhao Ben failed. After Liu Bang conquered Xianyang, most of the Guanzhong Corps surrendered to Liu Bang.

In addition to the above-mentioned three legions, the prisoner corps also has the most powerful prisoner corps, led by second lieutenant Zhang Han. When Zhou Wen's army approached Xianyang, Zhang Han led 200,000 troops to fight against it. This 200,000-strong army fought all the way with Zhang Han, invincible and invincible. If they were all prisoners, they wouldn't have such high cohesion and such strong fighting capacity. In addition, if they are all prisoners, aren't they afraid of prisoners escaping or rebelling? Anyway, there is chaos in the world, so 200,000 prisoners should have 65,438+10,000 Central Army of the Qin Dynasty and half of Qin Jun prisoners, which are much better than all prisoners, whether in supervision or in combat. The 200,000 captive army led by Zhang Han was defeated by Xiang Yu in the Battle of Julu. After the king was completely annihilated, he led the army to surrender. As a result, Xiang Yu killed 200 thousand captive troops, which led to the collapse of the captive army.