At that time, the Western Regions were rich in minerals, forests, and grassland resources, and the territory was vast, suitable for human habitation and military training, so the Western Regions were conquered.
The ancient Western Region was rich in resources and vast land. Whoever could dominate this land would have the source of war. It can have a strong supply capacity, which is very important in the age of weapons. During the reign of Emperor Xuan of the Han Dynasty, the Han Dynasty had established a protective palace in the Western Regions, incorporating the Western Regions into the Chinese territory for the first time. In addition, at that time, the small countries in the Western Regions were still independent and had parallel conflicts. This was the main reason why the Central Plains dynasty wanted to conquer the Western Regions at that time.
With the change of dynasties and the further decline of the Han Dynasty of China at that time, the role of the Western Regions Protectorate became smaller and smaller, and the Western Regions entered a long-term melee situation. It was not until the unification of the Eastern Han Dynasty that Ban Chao took control of the Western Regions again. Unfortunately, the Eastern Han Dynasty was too short-lived, and it did not take long before the Western Regions were lost again. At that time, the Central Plains also began a period of chaotic war between the Northern and Southern Dynasties. During this period, the political power was short-lived. No king could effectively control the Western Regions. It was not until the Sui and Tang Dynasties that there was a strong central government to conquer.
After the end of the Sui and Tang dynasties, about a few hundred years passed, and by the Yuan Dynasty, the Mongols at that time moved quickly, and Mongolia could have an area of ??tens of millions of square meters. Later, the Yuan Dynasty was split from it, with a land area of ??nearly 10 million square kilometers, including the Western Regions. The Qing Dynasty ushered in another major territorial expansion. From Kangxi to Qianlong, three emperors pacified Junggar and once again controlled the Western Regions. At that time, countries around the world were undergoing major changes, and they wanted to regain the precious land of the Western Regions.
For the ancient Central Plains dynasties, whoever controlled the Western Regions could open up the Silk Road and develop rapidly, accelerate the economy, and strengthen the army and the country. This shows the importance of the Western Regions.