What are the differences in policies towards Xiongnu from the beginning of Han Dynasty to Emperor Wudi of Han Dynasty? Why is there such a change?

Before Emperor Wu of the Han Dynasty implemented the policy of concession and pro-intimacy: during the period of Emperor Wu of the Han Dynasty, he launched a large-scale military counterattack against the Huns.

This policy change is naturally related to the talents of Emperor Wu of the Han Dynasty, but in the final analysis, it depends on the changes in the national strength of the Western Han Dynasty.

Militarily, Emperor Wu of the Han Dynasty sent Wei Qing and Huo Qubing to "strike the Huns three times", which relieved the threat from the north and made China the first overlord in Asia and the first empire in the world.

Due to proper internal and external measures, the contradictions left over by Emperor Wu of the Han Dynasty were basically controlled, and the decline trend of the Western Han Dynasty was reversed. "The people are rich and the country is strong, and the four foreigners serve."

In fact, the verbal victory did not bring much blow to the Huns. On the contrary, it destroyed decades of peace between Han and Hungary and brought great suffering to the people of both sides.

Because the strength of national strength is the material basis that determines the outcome of the war. During the period of Emperor Wu of the Han Dynasty, a series of measures were taken to unify the Western Han Dynasty politically, economically, militarily and ideologically, and entered its heyday, with a very strong national strength.

So we can launch a large-scale armed attack on the Huns and win the war. This is not available in Qin, Han, Sui, Tang, Song, Yuan and Ming Dynasties. Of course, this is not entirely because of this reason, there are other important reasons.

The "expansion" of the Han people is mainly because they can't stand the slaughter, plunder and harassment of the surrounding ethnic groups in order to compete for the former territory, in order to stabilize the territory of the country and avoid future troubles.

Therefore, they can only adopt the strategy of shrinking, sacrificing some interests and even sacrificing their own people to maintain their strength.

In the early years of the Western Han Dynasty, due to the lack of economic strength and internal instability, from Liu Bang to the early years of Emperor Wu of the Han Dynasty, the Han Dynasty always adopted a pro-Xiongnu policy and gave Xiongnu a lot of gifts and money every year.

After the Mongols occupied Central Asia, many people became slaves of the Mongols. With the expansion of Mongols, they also entered the Central Plains.

After that, the Han dynasty gradually changed the mode of production here, organized a large number of immigrants to carry out agricultural production here, and organized a large number of soldiers to be stationed here.

However, when they went deep into the Han areas, they encountered a more advanced feudal civilization, which forced them to accept the feudal ruling order in the Han areas and then made them transition to the feudal system.

However, the pro-marriage policy failed to stop the plunder of Xiongnu nobles, and the production in the northern frontier was often destroyed, and countless Han people were robbed or killed.

The Han Dynasty had a large population, and the central government had certain economic ability to manage and bear certain expenses. Song dynasty also exempted some necessities of life from taxes to ensure the normal life of the lowest people.

In order to better improve the circulation of goods and meet the needs of rulers, the famous Beijing-Hangzhou Grand Canal was opened during this period to visit the beautiful folk customs in the south.

After Emperor Wu of the Han Dynasty ascended the throne, the autocratic centralization was strengthened unprecedentedly, the social economy developed greatly, and the military strength was also strengthened. Emperor Wu of the Han Dynasty decided to change the pro-Qin policy and launch a large-scale war against Xiongnu in an all-round way.

Although it didn't last long as a military operation, it had a great impact and was a war in which the public participated extensively.

The war took place during the May 4th Movement in China, when the Western Jin regime was still in existence and the Eastern Jin regime had just been established, and the position of the Han people was already in jeopardy.

At that time, some economically backward countries were invaded by foreign powers. Fortunately, they persisted and won the final victory, but they also paid a huge price.