Why did the Xiongnu's westward march change the history of Europe? Why did the Huns occupy Europe?

The first stop of Xiongnu's westward migration was Wusunguo in the Western Regions. After the Huns conquered Wusun people, they lived in Wusun for more than 70 years. In A.D. 160, the Xiongnu was defeated by Xianbei and forced to move westward to the Volga River and the Don River again. Huns settled here for more than 200 years and conquered the local Aramaic people. In 374 AD, Huns continued to migrate westward, bringing obedient Aramaic people into Eastern Europe and Ukraine. The Huns' next goal to conquer is ostrogoths, a branch of the Germans.

In 374 AD, Xiongnu attacked ostrogoths in Eastern Europe. At that time, Goths lived in the left bank of Transnistria, ostrogoths lived in the east bank of the river, and Visigoths settled in the west bank of the river. This is the first contest between Asian barbarians and European barbarians. In a battle without suspense, the Huns attacked the eastern Goths with dense arrows and whirlwind cavalry, telling them what Asian glory is. Ostrogoths, who had always been brave, was defeated again and again, and later surrendered to the Huns. In 376, the Huns marched west and swept the Visigoths on the west bank of the river. Seeing this, the remaining Visigoths fled all the way to the west, which opened the prelude to the first national immigration in European history-Germanic immigration. A hundred years later, the weak Western Roman Empire was also destroyed by the Germans.

After defeating the Goths and occupying the grasslands in southern Russia, the Huns were able to rest and the population began to increase sharply. At the same time, a few tarquin people are still harassing neighboring countries: a group of tarquin people crossed the Danube and harassed the Roman Empire with the Goths; Another group of Huns attacked Mesopotamia and occupied Ezra in 384. In 396, another group of Huns invaded the Persian Empire.

With the continuous expansion of territory, the Xiongnu Empire with the Hungarian Plain as its ruling center was basically established in Okta era. This military empire has become the most serious threat to the eastern and western Roman empires. Under the leadership of Okta Khan, the Xiongnu Empire prospered again. After Okta's death, his brother Luca succeeded to the throne. Lugahan ravaged Thrace and Macedonia in 422 and 426, forcing the emperor of the Eastern Roman Empire to pay 350 Jin of gold to the Xiongnu Empire every year. After that, the Eastern Roman Empire was forced to open the same market to the Xiongnu Empire at the border to ensure peace on the border.