The Qin dynasty to resist the Huns I measures are

After the reunification of the Qin Dynasty, the measures taken against the Xiongnu were as follows

(1) Meng Tian led the army to defeat the Huns and seize the vast area of Hetao.

② Move mainlanders to Hetao area to develop production and strengthen border defense.

③ Building the Great Wall of Wan Li.

1. The battle of Qin attacking Xiongnu was in 2 15 BC, and Qin Shihuang sent general Meng Tian to attack Xiongnu with 300,000 troops in the north. Meng Tian's army captured Henan, occupied Yangshan and set up Jiuyuan County. The Great Wall originally built by Qin, Yan and Zhao countries was supplemented and repaired, and the Great Wall of Wan Li, which starts from Lintao in the west and ends in Liaodong in the east, was established, making it a fortress for the Han people in the Central Plains to resist the nomadic people in the north for two thousand years.

2. Preemptive strike

In the summer and autumn of the thirty-second year of Qin Shihuang, according to the original battle plan, Meng Tian set out from Shang Jun and entered the northern Hetao via Yulin. An army entered the south of Hetao from the road of Yigu Xiaoguan, and the two armies attacked the scattered Xiongnu tribes without great resistance. By the early winter of this year, all the Xiongnu tribes in Hetao area had been swept away, and the remnants of Xiongnu fled across the river to the northwest. Meng Tian pushed the two armies to the south bank of the Yellow River for the winter to prepare for the battle next spring.

In the early spring of the thirty-third year of Qin Shihuang, Meng Tian's main force crossed the Yellow River from Jiuyuan (now Wuyuan County, Inner Mongolia) and attacked Gaoque and Taoshan (now Langshan Mountain Range). One army crossed the Yellow River westward and entered Helan Mountain Range. The Huns were shocked by the military strength of Qin State and fled to the north. So all the land occupied by Huns was restored.

In order to protect the safety of Xianyang and Qin Dou, Meng Tian has been guarding the border for more than ten years, and he knows the mountains and rivers in the north like the back of his hand, so as to prepare for the future counterattack against Xiongnu. On the other hand, the first emperor ordered the Great Wall to be built, and the border between the Qin Dynasty and the Xiongnu and other northern minorities was as long as Wan Li, so it was unrealistic to send troops everywhere, while the Xiongnu was dominated by cavalry, which was mobile and fast. In order to better defend the Huns from going south, the Qin Dynasty made a defensive ride with the city wall.

3. Xiuchi Road raises wages

At the same time, Qin Shihuang also built the equator and raised his salary. In the same year after the unification of the six countries, Qin Shihuang ordered the construction of the equator throughout the country. The first one leads to Beidi (the county governs Yiqu, now northwest of Ning County, Gansu Province) and Longxi (the county governs Didao, now Lintao, Gansu Province). After Qin Shihuang became emperor, his first inspection work was to go to Beidi and Longxi to inspect defense. As the first emperor, he set up three granaries: Huang (now Huangxian East, Shandong Province), Kui (now Fushan, Shandong Province) and Langxie (now Jiaonan, Shandong Province) to provide logistical support for northern affairs. Therefore, when Qin Shihuang made an east tour, he went to Youbeiping, Yuyang, Shanggu, Dai Jun, Yanmen, Yunzhong and Shang Jun. After the inspection, Ying Zheng issued a decision to send 300,000 troops north to fight the Huns. After that, Qin Shihuang sent Meng Tian to guard the Xiongnu.

4. Recover Henan land

It is wise and pragmatic for the Qin Empire to set the goal of this campaign as recovering Henan land and restoring the border opened by King Wuling of Zhao. Most of the Xiongnu's main forces are in Yinshan Mountain and Helan Mountain, and the power of going south to Henan is relatively weak.

Qin has been preparing for war for many years, and its attack is fierce. Meng Tian led 300,000 troops to the north via Yulin and quickly captured the northern Hetao. At the same time, Qin Jun in the north and west of Gansu also attacked the south of Hetao.

Faced with the sudden force of the Qin Empire, the Huns were caught off guard. Hun soldiers in Henan are mostly scattered tribes, unable to resist Daqin's fighters and being defeated one after another. Qin quickly recovered Henan and advanced to Beichuan.

5. Drive Huns to the North

After fighting for the land of Henan, Meng Tian clearly realized that Xiongnu would not be willing to lose the land of Henan, and would definitely organize a counterattack. So the first step was to be strong. In the second year, he crossed the river to lead the main force, entered the highlands of Yinshan Mountain and Helan Mountain, found the main force of Xiongnu in Gaoque, Yangshan Mountain and Beifake, and launched a fierce battle with it. Tou Man, the leader of Xiongnu, is gathering troops and preparing to go south. Unexpectedly, Qin Jun was killed again, caught off guard, and Qin Jun has advantages in strength, number and arms. Meng Tian's troops won Lien Chan, which dealt a great blow to the Huns. Tou Man Khan was forced to withdraw from Yinshan Mountain and Helan Mountain Highlands, retreated more than 700 miles to the north, and retreated to the desert south area north of Yinshan Mountain for nomadism.

At this point, Meng Tian fought the Huns and won easily. Since then, 300,000 troops from Meng Tian have been stationed in the north to deter the Huns. Qin Shihuang then set up Jiuyuan County and 34 counties in Henan, and moved 30,000 households to the north in 2 1 1 BC to develop Henan, making it a rich new Qin and a rear base for fighting against Xiongnu.

Build the Great Wall

Forced by the situation at that time, in the struggle with the Xiongnu slave owners and nobles, the Qin Dynasty built a world-famous great project-the Great Wall. In 2 13 BC (the thirty-fourth year of Qin Shihuang), the Qin Dynasty connected the Great Wall of Qin, Zhao and Yan, and built the Great Wall of Wan Li from Lintao (Min County, Gansu Province) to Jieshi, Liaodong. This Great Wall has played an important role in resisting the harassment of Huns and ensuring the stability of production and life of mainland people.

The Great Wall was built to protect people's lives and property on the northern border, and its purpose was to reduce people's burden. Because the Huns are nomadic people, their cavalry activities are very extensive. Without the Great Wall, many troops will be needed to defend them, which will add a great burden to the people. Qin Shihuang didn't create the Great Wall, he just connected the original Great Wall in the northern part of Qin, Zhao and Yan, but the history books blamed Qin Shihuang for all the suffering caused by the Great Wall, which is not true. It turns out that there are some Great Walls between countries, but the Great Wall in the north is incomplete. After reunification, he ordered the original Great Wall between countries to be demolished, and then the Great Wall in the northern part of Qin, Zhao and Yan countries was connected to prevent the Huns from invading the south.

7. Open up the frontier

In order to further consolidate the rule here, in 2 1 1 BC, Qin Shihuang moved more than 30,000 households to Beihe and Yuzhong (north of Ejinhoro Banner in Inner Mongolia) to reclaim production land and open up frontiers. This large-scale migration is of great significance both economically and militarily. It not only effectively stopped the looting of Huns, but also promoted the development of this area.

8. Impact;

The victory of Meng Tian's Northern Expedition to Xiongnu not only effectively stopped the plundering of the Central Plains by Xiongnu slave owners and nobles, but also further promoted the development of this region. The battle of Qin attacking Xiongnu was an important part of the North-South expansion strategy of the Central Committee of Qin Empire, and its series of conquest wars laid the basic pattern of China's unification of a multi-ethnic centralized country.