The main purpose of the large scale construction of the Great Wall by the ancient feudal rulers of C

The main purpose of the large-scale construction of the Great Wall was military defense and to prevent the northern ethnic groups from disturbing the border and causing wars on the northern border. It's just that the object of defense is different for each dynasty. Let me be specific:

1. Qin Dynasty: After Qin destroyed the Six Kingdoms, Qin Shi Huang repeatedly sent Meng Tian to fight with the Xiongnu, and both sides suffered heavy losses, and the Great Wall was built mainly to prevent the Xiongnu from going south. 2. Han Dynasty:

The Xiongnu took advantage of the war in China, crossed the Great Wall built by the Qin general Meng Tian, and confronted the Han Empire with the Great Wall of Qin, Zhao and Yan as the boundary. At the beginning of the Han Dynasty, there were many famous generals who resisted the Xiongnu, and after Emperor Wu of the Han Dynasty came to power, he built the Outer Great Wall on the basis of the Great Wall of Mengtian to strengthen the defense of the Xiongnu. 3. Sui Dynasty:

The southern raids and plundering of the Mobei Turks, Emperor Wen of the Sui Dynasty Yang Jian built the Great Wall and consolidated the border defense, and the two generations of rulers of the Sui Dynasty successively dispatched nearly 2 million laborers to build the Great Wall seven times; Fourth, the two Song Dynasty, mainly to defend the Liao, Jin, Xixia and other ethnic groups in the north. 5. Ming Dynasty: In the early Ming Dynasty, it was relatively strong, and during the Yongle Emperor, it forced Warat and Tatar to accept the canonization of the Ming Dynasty respectively.

In the middle of the Ming Dynasty, after the "Civil Engineering Change", Warat and Tatar continued to raise troops to invade the border and plunder, forcing the Ming Dynasty to build the Great Wall in the north. In the late Ming Dynasty, the Mongolian Altan Department and the Ming Dynasty negotiated peace and mutual markets, and the northern border was slightly quiet, and the border troubles mainly came from the Jurchen people in the northeast. 6. In the Qing Dynasty, due to the entry of the Jurchens, the Great Wall basically lost the practical significance of defense.

I hope you are satisfied.

The purpose was to defend against the invasion of the northern nomads. For example, the Xiongnu, Xianbei, Mongolia and other ethnic groups due to the production of goods in the Central Plains, and due to the friction between different ethnic groups, it finally became a robbery, and the Central Plains ethnic groups could not attack long-distance, but could only defend, so they built the Great Wall.

The most ruthless people who built the Great Wall were the Qin Dynasty and the Ming Dynasty, these two dynasties had the greatest problems in the north, and the other dynasties were either established by the northern peoples or opened up and integrated with the northern peoples.

The Great Wall can't solve any problems, the gun is still robbed, and the solution to this problem in the late Ming Dynasty is to do business between the two sides, and the northern problem in the late Ming Dynasty has been greatly eased.

The Great Wall is a general term for the large-scale military projects built by ancient China at different times to resist the invasion of the alliance of nomadic tribes in northern China. The Great Wall stretches for tens of thousands of miles from east to west, so it is also called the Great Wall. The Great Wall was built more than 2,000 years ago in the Spring and Autumn Period and the Warring States Period, and the existing remains of the Great Wall are mainly the Ming Great Wall, which was built in the 14th century.

According to data released by the State Administration of Cultural Heritage in 2012, the total length of the Great Wall in previous dynasties is kilometers; The Great Wall is a testament to China's long history. It is listed as one of the Seven Wonders of the Middle World along with the Colosseum, the Leaning Tower of Pisa, etc. In December 1987, the Great Wall was listed as a World Heritage Site.

Mainly to defend against the invasion and harassment of northern nomads.

1 is to resist the invasion of foreign enemies, after all, there was no high-tech ** at that time, the Great Wall can observe the enemy's situation and make preparations for defense.

The main purpose was to defend against foreign invasions, such as the nomadic Xiongnu.

The Great Wall is not only the longest in China but also in the world, one of the largest ancient defense projects, which has been continuously built for more than 2,000 years since the Western Zhou Dynasty, and is distributed over the vast land of northern and central China, with a total length of more than 20,000 kilometers.

Since Qin Shi Huang, almost all dynasties that ruled the Central Plains have built the Great Wall. More than 10 dynasties, including the Han, Jin, Northern Wei, Eastern Wei, Western Wei, Northern Qi, Northern Zhou, Sui, Tang, Song, Liao, Jin, Yuan, Ming and Qing dynasties, built the Great Wall on different scales. In terms of the ruling ethnic groups that built the Great Wall, in addition to the Han Chinese, many ethnic minority dynasties ruled China also built the Great Wall, and more than the Han ruled dynasties.

During the Kangxi period of the Qing Dynasty, although the large-scale construction of the Great Wall was stopped, the Great Wall was also built in some places, and it can be said that from the beginning of the Spring and Autumn Period and the Warring States Period to the Qing Dynasty for more than 2,000 years, it has not stopped the construction.

According to historical records, there are more than 20 princely states and feudal dynasties have built the Great Wall, if you add up the Great Wall built in various eras, there are more than 100,000 li, of which the length of the Great Wall built by the Qin, Han and Ming dynasties is more than 10,000 li.

Xinjiang, Gansu, Ningxia, Shaanxi, Inner Mongolia, Shanxi, Hebei, Beijing, Tianjin, Liaoning, Jilin or Nian, Heilongjiang, Henan, Shandong, Hubei, Hunan and other provinces, municipalities and autonomous regions in China have the remains of the ancient Great Wall and beacon towers.

The Southern Song Dynasty and the Eastern Jin Dynasty will definitely not be able to repair, because their territory is not enough.

The Great Wall is a military project in ancient China. The Great Wall was built in the Zhou Dynasty. The princes of the Beacon Fire Opera of the King of Zhou You are the earliest allusions to the Great Wall.

The Great Wall was built in the Qin Dynasty and is a masterpiece of Qin Shi Huang, and subsequent emperors have also repaired it.

Construction period.

From the Spring and Autumn Period and the Warring States Period to the Ming Dynasty.

Have you ever heard of Meng Jiangnu crying on the Great Wall?

The Great Wall in the north of our country began in the Warring States of Qin, Zhao and Yan.

In the sixth year (332 BC) and the tenth year of King Huiwen of Qin, he defeated Wei and seized the land of Weixihe County (now Luohe River Valley, Shaanxi) and Shangjun (now northeastern Shaanxi). In order to prevent the Huns from plundering south, King Zhao ordered the construction of the Great Wall on the northern borders of Longxi, Beidi, and Shangjun, and sent troops to garrison it.

In the nineteenth year of King Wuling (307 BC), Zhao began to reform the military system, and carried out Hufu cavalry and archery. Since then, the army has grown. In the twentieth year, the king of martial arts, Sillo Linhudi, to Yuzhong, the king of Linhu sacrificed his horse and surrendered, and only then did he return from the class.

In the twenty-sixth year (300 years ago), he broke through the middle mountains, and expanded the land to the north to Yan and Dai (now the northwest of Shanxi), and expanded to Yunzhong and Jiuyuan in the northwest (now Inner Mongolia and Lingel County to the Wujiahe area). Therefore, he ordered the construction of the Great Wall, from the Daihe Yin Mountain (now Inner Mongolia Daqing Mountain, Urad Mountain) to the west, to the Dahe River (now Inner Mongolia Wujia River), and placed Dai County, Yanmen, Yunzhong County, in order to prevent the Xiongnu from going south to plunder.

Yan was the weakest of the Seven Heroes of the Warring States, bordering the strong Qi and the newly rising Zhao in the south, and Donghu in the north. It was not until after the accession of King Yan Zhao (311 BC) that he became strong and strong, recruited capable people from all over the world, and implemented reforms, and the Yan Kingdom became strong. At that time, Donghu was strong, and often raided the northern part of Yan in the south.

In order to maintain peace in the north, Yan Jun was forced to make peace with the king of Donghu and took the general as a hostage. During the reign of King Zhao, Qin opened the question of Donghu, he was wise and brave, and the king of Donghu believed in him very much, so he was free to move, and was able to understand the dangerous mountains and rivers in the south of Donghu, the situation of deployment and the activities of the army. After returning to China, he led a large army to attack Donghu and broke it, but Donghu was more than 1,000 miles away.

He also "crossed Liaodong and attacked Korea" to expand the land to Hunshui (now the Qingchuan River in North Korea). As a result, "Yan also built the Great Wall, from Yang (now Kangbao County, Hebei Province and Taifu Temple Banner of Inner Mongolia) to Xiangping; Shanggu, Yuyang, Youbeiping, Liaoxi, Liaodong County to reject Hu. ”

To sum up, during the Warring States Period, the reason why Qin, Zhao, and Yan built the Great Wall in the north was to defend against the raids of the Xiongnu, Donghu and other ethnic groups.

After the Warring States Period, according to historical documents, there were three dynasties that built the Great Wall for more than 5,000 kilometers: first, the Great Wall built by Qin Shi Huang from Lintao in the west to Liaodong in the east; The second is that the Han Dynasty built from the west to the present, more than 50,000 kilometers. The ruins of these Great Walls are distributed in more than 10 provinces, municipalities and autonomous regions in today's China, including Beijing, Gansu, Ningxia, Shaanxi, Shanxi, Inner Mongolia, Hebei, Xinjiang, Tianjin, Liaoning, Heilongjiang, Hubei, Hunan and Shandong.

Among them, there are more than 10,000 kilometers of ruins in the Inner Mongolia Autonomous Region alone. The second is the Great Wall of Gansu. Due to the long time, most of the Great Wall in the early eras were incomplete, and now the Great Wall built in the Ming Dynasty is relatively intact.

Therefore, the Great Wall that people generally talk about mainly refers to the Great Wall of the Ming Dynasty. The length of the Great Wall also refers to the length of the Great Wall of the Ming Dynasty, which stretches from Jiayuguan in the west to the Yalu River in the east.

During the Warring States Period, countries began to build the Great Wall, and Qin Shi Huang just connected the Great Wall of various countries together, so it was called the Great Wall of Qin. The purpose was to prevent the Hu people from moving south, resist the invasion of the northern minorities, and consolidate the rule of the Qin Dynasty.

As early as the Spring and Autumn Period and the Warring States Period, in order to resist foreign invasions, various countries built beacon towers and connected them with city walls to form the earliest Great Wall. The main purpose of the Qin Dynasty in building the Great Wall was to defend against foreign invasions.

During the Warring States period, the northern princes were on defense.

Fan Xiongnu people invaded and built the Great Wall for many years, after Qin destroyed the six countries, the Great Wall of various countries was connected, forming the prototype of today's "Great Wall", after the repair of various dynasties, the Ming Dynasty reached the longest, from Shanhaiguan in the east, to Jiayuguan in the west! After the Qing army entered the customs, due to the Manchu and Mongolian peace policy, plus the Manchu rulers' discord with the Mongolian tribes, pulling and fighting, the military role of the Great Wall gradually faded!

As far as I know, before the Qin Dynasty, all countries built the Great Wall, and after the Qin State unified the Six Kingdoms, the Great Wall was officially built, that is, the Great Wall that continues to this day!!

During the Spring and Autumn Period and the Warring States Period, the Qin Dynasty only connected the Great Wall of various countries, in order to defend against ethnic minorities, there were advantages and disadvantages.

In the early days, the Great Wall was built using local materials, i.e., rammed brick walls. This is the same method used to build dwellings: two rows of planks are erected to form two sides of a wall, and then the earth is poured into the sealed planks in layers, and then it is tamped.

The planks are on average 4 meters long and can hold 80 cubic meters of earth. This made it possible to produce a layer of bricks 8 10 cm thick, although it was later found that there were also layers of bricks 3 20 cm thick. Sometimes, a thin layer of reeds is sandwiched between the soil layer to speed up the drying process of the bricks.

In the Gobi Desert and steppe areas, the construction of the city walls was based on local plants. Fifteen centimeters of red palm leaves or reeds were mixed with a not-so-thick layer of pebbles and earth to create a brick wall with a local character. In the Tarim Basin, the walls were built with large bundles of shrubs, poplar trunks mixed with tamped adobe.

An important feature common to all walls is that each layer is rammed hard and then another is rammed. The durability of this type of construction can be seen in the few sections of the wall that have been preserved. These sections of the wall were built in 656 BC.

In the north of Zhongkuang, the Qin city wall from 300 BC is still 3 meters high. The bottom of the wall is meters wide, and the upper part of the wall is meters wide, and it is made of yellow mud and a small amount of rubble rammed. In Gansu, the 4-meter-high Han city walls are preserved, including one of the largest fortresses at Wangmen Pass.

The bricks of the walls are staggered at the corners, and the square gates are narrow at the top and wide at the bottom, which prevents the walls from collapsing. In this area, there are also more than 100 beacon stations. They were built either of rammed adobe or of sun-dried bricks.

On these sections of the city wall, every 1600 2500 meters, there is a beacon tower with a width at the bottom and a narrow tower at the top, with an area of 17 square meters at the bottom and a height of 25 meters. On the wall of the beacon. There are also obvious traces of scaffolding.

Most of the Great Wall was built during the Ming Dynasty, when some new methods of construction emerged. The western section of the Great Wall is still built according to the traditional method. But in order to protect the capital Beijing from the Mongols and Manchus, its eastern section was made of stone and bricks, and its foundations were made of compacted earth or gravel.

Other fortresses, such as Shanhaiguan, are built like a small castle. There are bunkers and shelters for preparing for war, drawbridges for opening and closing, training grounds for training soldiers, and warehouses for war readiness. There is also a hay field outside.