What can the Great Wall block if it is so short?

The wall of the Great Wall is not high, but don't forget that the mountain where the Great Wall is located is high enough. Originally, these mountains had a certain height, standing high enough to intercept the invasion of troops and horses. In addition, they were blocked by a fence several meters high, making it more and more difficult for the original enemy to attack.

The targets to be defended in building the Great Wall mainly come from the northern nomadic tribes on the other side of the Great Wall. Beyond the Great Wall is the grassland empire of nomadic people, where the grass is rich and beautiful, the wind blows the grass low, and the cattle and sheep flock. It is an ideal place for cattle, sheep and horses to live. Although the grass is gray, Tatar horses are plump, and with their high quality and large number of horses, nomadic people have become invincible cavalry. No matter Xiongnu, Turkic, Xianbei, Qidan, Mongolia and Nuzhen, they all grew up on horseback and were cavalry, which undoubtedly laid a solid foundation for their later cavalry operations.

How to break cavalry tactics? Confrontation, just confrontation, the Central Plains cavalry is no match at all, but a long wall easily solved this problem, which is enough for cavalry troops to defeat the foundation. Since ancient times, have you ever heard of any nomadic cavalry who wants to bite the bullet and climb the wall? This is mainly due to the defensive function of the Great Wall. If the enemy cavalry refuses to listen to the city wall and chooses to make a detour, let him make a detour until they capture thousands of troops, climb mountains and mountains, find the weak loopholes in the city wall and carry out concentrated attacks. Soldiers from the Central Plains have climbed the Great Wall. At this time, on the city wall, the army has already assembled and the troops are heavily guarded, just waiting for you to fight the foreign enemy cavalry.

But the function of the Great Wall is not only defense, but also its second function-early warning. Want to know how to ride a thousand troops, just look at three cigarettes and two cigarettes ... Whenever the guards find an enemy attack, they will immediately light the Great Wall beacon tower closely connected with the platform, and the bonfires will be lit one by one until the news reaches the capital where the emperor is located, so that everyone can make preparations before the war as soon as possible and have countermeasures.