The Battle of Qin and Meng Tian Attacking Xiongnu

From 33 to 34 years of Qin Shihuang (2 14 BC-2 13 BC), Qin Shihuang sent general Meng Tian to attack the Xiongnu in the north. During the Warring States Period, Huns living in the north of China had entered the slave society. It occupies the vast grassland areas in Inner Mongolia and Ningxia today. At that time, the Central Plains countries had no time to look north, and the Huns often raided the northern border areas of Qin, Zhao and Yan bordering them.

After Qin Shihuang annexed six countries, Meng Tian ordered 300,000 troops to attack the Xiongnu in the north in order to relieve the Xiongnu's threat to Qin. In the spring of thirty-three years, the main force of Meng Tian's unification attacked its east from Shang Jun (the county for treating skin, now south of Yulin City, Shaanxi Province). Yang Wengzi led a division from Xiaoguan (now southeast of Guyuan, Ningxia) to the Great Wall and attacked its west. Xiongnu fled after defeat. The State of Qin then seized the land in Henan (now the land in Yike, south of Inner Mongolia River and Zhao Meng). There are 44 counties along the river, and immigrants will be cultivated.

Due to the continuous attack of Xiongnu, the following autumn, Qin Shihuang ordered Meng Tianjun to cross the Yellow River north, take Gaoque (now the Jilan Pass in the middle of Langshan Mountain in Inner Mongolia), capture Yangshan Mountain (now the Langshan Mountain and Yinshan Mountain in the north of Wu Jia, Inner Mongolia), and take a vacation to the north (now the Jiashan River area south of Wu Jia). The Huns were defeated and moved north. In order to consolidate Henan, Qin established Jiuyuan County (the county governs Jiuyuan, now northwest of Baotou City, Inner Mongolia). In order to prevent the Huns from going south, Meng Tian was ordered to recruit a large number of migrant workers to build the Great Wall of Wan Li from Lintao (now Min County, Gansu Province) in the west to Liaodong in the east, which played an important role in consolidating the northern border of the Qin Dynasty.