What is the function of building the Great Wall of Wan Li?

What was the purpose of building the Great Wall in ancient times?

from the Qin and Han dynasties to the Ming and Qing dynasties, many passes along the Great Wall became places or centers for ethnic trade in agriculture and animal husbandry, and some gradually developed into important towns along the Great Wall. The Great Wall not only ensures the normal development of agricultural economy, culture and animal husbandry economy and culture, but also provides a place and convenience for their exchange and mutual supplement. It also plays an important role in mediating the two economies and making the agriculture and animal husbandry economy develop in the direction of mutual cooperation between the main and the auxiliary. Therefore, the Great Wall not only played the role of separating the two economies and cultures, but also shouldered the heavy responsibility of closely linking the two economies and cultures.

during the Qin and Han dynasties, there were nearly 1 million soldiers and civilians. While building the Great Wall, Qin Shihuang began to strengthen the development and construction of border areas, which opened the prelude to stationing fields to defend the border areas and developing the border areas. Because it took a long time to build the Great Wall in the Han Dynasty, many people put forward suggestions on immigration, which were adopted and implemented by the Han government. Together with the soldiers guarding the Great Wall, the immigrants reclaimed wasteland for farming, which not only accelerated the economic development of the border region and saved a lot of military expenditure of the government, but also greatly reduced the pain of long-distance transportation and spread Chinese culture far and wide.

The Great Wall is the greatest military defense project in the ancient history of the world. It is not a simple and isolated first-line wall, but from point to line, from line to surface, connecting the passes, military fortresses, Guancheng and military towns along the Great Wall into a tight network, forming a complete defense system. The system of military fort, Guancheng and military town has many functions, such as fighting, commanding, observing, communicating, hiding and so on, and it is equipped with a point-and-line defense project that is permanently stationed in the army

The military defense thought embodied in the Great Wall plays an important role in the history of military development. The birth and development of the Great Wall kept pace with the whole military development in ancient China, which is of great significance to the study of the formation and development of ancient military operational thought. Qin Huang and Han Wu, including the early Ming Dynasty, all built the Great Wall when they took the initiative to attack and gained overwhelming military superiority. This shows that building the Great Wall is not only an active defense, but also a strategy to accumulate strength and continue to forge ahead.

The construction of the Great Wall is a positive measure for the military situation in the northwest, and it is a proactive defense from passivity. What needs to be emphasized is that the defensive function of the Great Wall is not "not captured" as most people think; Its real use lies in that the invaders may be able to concentrate on occasionally breaking through one or two passes and breaking into the mainland, but as long as there are strong troops stationed throughout the Great Wall, the invaders will always be in danger of being blocked and ambushed and unable to go home; In particular, the Great Wall has strangled the traffic arteries of Yanshan Mountain and the northern branch of Taihang Mountain. Even though nomadic cavalry broke through the customs, they could only harass the mainland, and their logistics could not be transported through the customs, so they could not establish themselves in the mainland, thus shaking the foundation of the Chinese empire. No matter how serious the scabies are, they can't invade, which is the fundamental significance of the existence of the Great Wall. ?