Cao Cao was the leader of the State of Wei, the great villain in the Romance of the Three Kingdoms, and the direct leader of the famous Sima Yi. When Cao Cao was alive, Sima Yi devoted his life to deference and respect, and never dared to rebel.
The world said that Cao Cao was a traitor, but in fact, Cao Cao did not claim the title of emperor when he was alive, and he ate well and drank well with Liu Xie, the emperor at the end of the Eastern Han Dynasty, and married his three daughters to Liu Xie.
Therefore, the statement that Later generations said that Cao Cao was a traitor is not entirely accurate. Cao Cao was posthumously honored as Emperor Taizuwu by his son Cao Pi. Cao Cao was stabbed in the eye and flesh by Zhuge Liang and Liu Bei of Sichuan Shu during the Three Kingdoms period, which is enough to show that Cao Cao was not a mortal.
Today, we will not talk about Cao Cao's merits or demerits, but about a secret of Cao Cao's rise, that is, the "underground Great Wall" that Cao Cao secretly built.
It was through the "Underground Great Wall" that Cao Cao quietly transported soldiers, and unconsciously transported a large number of soldiers to the battlefield, which caught Yuan Shao by surprise.
By defeating Yuan Shao, the largest warlord in the north, he became the largest military leader in the north, and only then did he exist in the three-legged state, that is, the state of Wei, the state of Shu, and the state of Wu.
The "underground Great Wall" secretly built by Cao Cao is not only a "killer weapon" on the battlefield, but also a great engineering miracle for future generations.
The name of the Great Wall of China is known to the whole world and all mankind, and the "underground military transport road" secretly built by Cao Cao was called the "Underground Great Wall" by later generations.
It is enough to show that this project is huge, complex in structure, comprehensive in function, and is also the oldest and best-preserved underground large-scale military facility in China.
Basic structure: green brick material and the length, width and height of the underground Great Wall
Cao Cao's "Underground Great Wall" echoes the Great Wall of Ten Thousand Miles, one in the lofty mountains of the heavens in Beijing Badaling, and the other in the very secret underground in Bozhou City, Anhui Province.
Both Great Walls are also for military warfare, and both Great Walls are the crystallization of human wisdom. The Three Kingdoms are about 1800 years away from the present, and the underground projects built by Cao Cao before 1800 years ago are complex in technology, excellent creativity, and reasonable layout, and today's professional engineering teams may not be able to succeed in repairing them.
First of all, the length, there are more than 8,000 meters, more than 8,000 meters are all made of green bricks, it is said that 200,000 soldiers were used to dig the soil, about 30,000 technical craftsmen who fired green bricks, and the city of Bozhou 1800 years ago was "bright and bright", and adults, women, and children all went into battle.
Cao Cao's "Underground Great Wall" is about 2 meters high, and the height is dug and cast according to the height of the soldiers, which fully reflects the humanized details of Cao Cao's work.
The width of the "Underground Great Wall" is about 1 meter, and in the event of an emergency battle, the width can be just enough to walk two soldiers at the same time, which fully reflects the forward-looking thinking of Cao Cao's work.
The ancient rule of two-person travel continues to this day. In addition, there is no light underground. Every 10 meters or so, a groove is chiseled out of the underground wall to place the oil lamp.
The underground Great Wall is specially reserved for ventilation holes, which lead directly to the ground, and the ground air can enter the underground to ensure the air circulation of the underground Great Wall, and the soldiers will not be suffocated.
Through the construction of the "Underground Great Wall", it can be concluded that Cao Cao was a pragmatist, by no means a good Daxigong character, and everything started from reality.
The length of 8,000 meters supports the size of the hoarded soldiers, the height of 2 meters ensures the spaciousness of soldiers when they walk fast, the width of 1 meter ensures the rapid passage of 2 soldiers, and the oil lamp and ventilation holes ensure lighting and air circulation.
The person cao Cao arranged to preside over the construction of the "underground Great Wall" must be a talent, and the professional level of architecture is no less than that of today's high-caliber students in the Department of Civil Engineering. Cao Cao was born in Bozhou, so the "Underground Great Wall" was also built in Bozhou. There is an emotional part of the hometown, and more importantly, there is an element of trust.
Functional structure: tunnels crisscross the tunnel, double lanes can talk, a huge number of combat obstacles
Cao Cao's "Underground Great Wall" and Beijing Badaling can be the upper and lower Great Wall, and it is by no means a waste of time. Beijing Badaling Great Wall, there are war rooms, military food equipment storage rooms, observation points. Versatile, it serves military operations.
The same is true of Cao Cao's "Underground Great Wall", in order to prevent the city from being breached, Cao Cao deliberately set up a "temporary military command room" in the "Underground Great Wall" to command large-scale operations of the whole army. In this way, Cao Cao was still not at ease, also just in case.
In case the entrance to the "Underground Great Wall" is found by the enemy and followed the entrance into the "Underground Great Wall", Cao Cao set up a wide variety of combat obstacles inside the "Underground Great Wall", so that when the enemy attacked in, Cao Cao had plenty of time to escape.
Among them, the most practical obstacle of ancient tunnels is also the most common obstacle of the "Underground Great Wall" - "obstacle coupons", which are not paper money and have nothing to do with the meaning of modern money. This "barrier ticket" is a combat mechanism with extraordinary attack power and can cause people to be disabled or killed.
The method of use is very simple, when the enemy attacks in, the enemy is definitely not familiar with the tunnel environment, does not know where the tunnel mechanism is hidden, can wait for the enemy to enter the obstacle coupon position, suddenly lower, and hit the enemy.
The "obstacle tickets" during the battle were basically for the purpose of death, which was one of the defenses inside Cao Cao's construction of the "Underground Great Wall".
Defense number two – "Barrier Wall". As the name suggests, an obstacle wall is a wall that blocks the enemy.
The "barrier wall" of Cao Cao's "Underground Great Wall" is set at the place where the "T" turns, and after the three national engineering designers have spent a lot of effort to design, this "obstacle wall" is narrow above and wide above.
From a distance it seems that it can be quickly passed, but when it is actually passed, it is difficult to know that when the enemy attacks in, a large number of soldiers rush to capture Cao Cao, and they will definitely be stopped here, and no one can get through. The "underground military transport road" built by Cao Cao can be described as a lot of organs and hidden mysteries.
Defense Number Three – "Trap Ground". The trap ground is also the use of the wisdom of the ancients, specifically the trap ground is located below the one-way street, the enemy walks on it, Cao Cao's soldiers can suddenly make the tunnel one-way road ground lower, the enemy soldiers fall down, the head is broken and bleeding, lose the ability to fight, and become Cao Cao's prisoners.
Defense Number Four – "Cat Ear Hole". Cat ear piercings are different from the above three. All three of the above are "offensive" defenses, and "cat ear holes" are hidden defenses. Cao Cao's soldiers or military equipment avoided enemy bows and arrows and artillery, which was very effective in reducing casualties.
The history of cat ear piercing in China is very long, and ancient Chinese generals invented "cat ear piercing" before the Three Kingdoms. During the Liberation War and the War of Resistance Against Japan, the Chinese People's Liberation Army excavated a large number of cat ear holes and severely damaged the Japanese and Kuomintang troops.
The "Underground Military Transport Road" built by Cao Cao has many rooms and many functions like the Great Wall. Although there are so many combat organs, the main function is to hoard soldiers. When the enemy attacked the city, Cao Cao transported his elite troops from within the city through tunnels outside the city and attacked the enemy from behind the enemy.
Soldiers are not tired of deception, Cao Cao sometimes deliberately exposed flaws, so that the enemy thinks that there are not many soldiers in the city, when the enemy army enters the city, Cao Cao then transports the soldiers back to the city from outside the city, surprisingly victorious, and fighting is the essence.
Through Cao Cao's "underground Great Wall", we can see Cao Cao's wisdom and strategy, and the brain melon is definitely a top and a smart one, and ordinary people will definitely not be able to catch up.
Successive generations of construction: Tang, Song and Qing dynasties built, the second time forever hidden in the ground
The "Underground Great Wall" built by Cao Cao is the same as the "Great Wall" built by Qin Shi Huang. Both of them are the first builders of grand projects, but they are not the end of grand projects.
The "Underground Great Wall" built by Cao Cao may only be a masterpiece of engineering for Cao Cao to defeat Yuan Shao and achieve military goals, but it has been used and expanded by the monarchs of later dynasties.
Just like the Great Wall, Qin Shi Huang began to repair, successive dynasties have been maintained and repaired, the Ming Dynasty Xuda overhauled, so that the scale of the Great Wall has a prototype. The "Underground Great Wall" built by Cao Cao was of great strategic significance to later generations, leading the Tang and Song dynasties to spend huge sums of money on its maintenance and construction.
By the time of the Song Dynasty, the Song Emperor greatly increased the degree of secrecy of Cao Cao's "Underground Great Wall", and strictly stipulated that non-core members of the imperial court were not allowed to know, and non-senior generals of the army were not allowed to know, otherwise there would be no forgiveness.
This fully illustrates the important role played by Cao Cao's "Underground Great Wall" in the wars of later generations, such as the Huangchao Rebellion of the Tang Dynasty and the Battle of the Jin and Song Dynasties of the Song Dynasty, and Cao Cao's "Underground Great Wall" should have played an important military role.
However, Cao Cao's "Underground Great Wall" has a bad fate, according to historical records, in the Southern Song Dynasty in 1240, Henan's Yellow River broke, because Henan is adjacent to Anhui, the water of the Yellow River entered Bozhou, Anhui, submerged Cao Cao's "Underground Great Wall", and has since been buried deep underground for 700 years.
Time came to the Qing Dynasty, Daoguang in 1841, Henan's Yellow River broke again, this time the flood was more ferocious, the flood was called the beast, lasted for 8 months, Cao Cao's "underground Great Wall" was buried in the ground for the second time.
Seeing the light of day again: The president of the Academy of Military Sciences inspected and reported to Premier Zhou Enlai
In 1969, China vigorously advocated the excavation of air raid shelters, and it did not matter if the people of Bozhou City dug it up, and dug up the "Underground Great Wall" built by Cao Cao for 700 years.
When it was first opened, it was thought to be an underground palace, but later after exploration by archaeologists in Bozhou City, it was confirmed through the cultural relics storage and writing inside that this was the "underground Great Wall" built by Cao Cao.
The "Underground Great Wall" built by Cao Cao eventually became famous, and the president of the New Chinese Academy of Military Sciences specially came to Anhui to investigate, and the military scientist Cao Cao specially built it in order to defeat the enemy before 1800.
After 1800, the president of the Academy of Military Sciences came to investigate, and I have to say that this was a historical coincidence and arrangement. Later, under the special instructions of Premier Zhou Enlai, he was appointed to arrange for Mr. Liang Sicheng, the son of Liang Qichao, a leading figure in Chinese architecture, to come to investigate. In 1999, Mr. Wen Jiabao, the good premier of the people, inspected Bozhou City on official business and specially visited the "Underground Great Wall" built by Cao Cao.