Sun Ji and Xue Yu, constantly communicated, to be honest, the performance of the powder, almost for the first time, was thought of by them for military use, they even recalled some regrets in the previous war, especially Xue Yu, he did not return with honor in the northwest battlefield, at that time in the first battle of Mingzhai, he was one of the few people who survived, it can be said that the brothers robes Ze, where did they die. Pen ~ fun ~ pavilion www.biquge.info

The more people talked, the more lively they became, and Qu Yang next to him also interjected a few words from time to time, without exception, they all put the status of this powder very high.

So close, all their communication did not escape Zhao Xin's ears, especially when they heard that if there was cement, they could build the city faster and reduce the collapse of the city wall due to the construction of too high.

The speaker didn't realize what was leaked, but Zhao Xin listened to the intention of collapsing, could it be that the glutinous rice porridge used and the city wall built would collapse when it was too high, which he had never known, and had never even thought about.

In later generations, there was a discussion about the fortress as to why there was no super defense such as the fortress in ancient China, because the fortress appeared in the 16th century, and the real prestige was in the Battle of Metz.

In May 1552 King Henry II of France captured the city of Metz in the Lorraine region. Five months later, the Holy Roman Emperor Charles V led an army of 45,000 to besiege Metz, trying to recapture it, 9 times the number, as well as a large number of firearms and engineering equipment, it can be said that for the Holy Roman Emperor, it was a must-win, but in the end it fell short.

Over the course of 5 months, the 5,800 defenders, under the command of the Duke of Guise and the engineer Saint-Rémy, had rebuilt a new line of defense behind the old walls. On November 27, the attackers fired more than 7,000 shells in one day, knocking down more than 70 meters of city walls, and the defense line of the fortress behind it was still intact.

This does not show the strength of the fortress, the independence of the Netherlands shows the strength of the fortress, the Netherlands made a large number of use of the fortress, so that the Spanish army in the fortress chain of defense, difficult, and finally, let the small and weak Netherlands, in Europe with many powerful countries.

You know, because of the Age of Discovery, the European artillery of the 16th century has surpassed the history of China, from the end of the 15th century, European countries have begun to innovate in artillery, only stronger thermal weapons, stronger artillery, can occupy the upper hand in naval warfare.

China in this era is in the Ming Dynasty period, and is still immersed in the era of ordinary thermal weapons, the most powerful artillery of the Ming army at the end of the Ming Dynasty, the red-coated cannon is actually a front-loading smoothbore cannon, this kind of artillery is handed down from Europe, the original name is called the Little Franc machine gun, in fact, it is not the strongest artillery in Europe, it is the naval artillery, not the largest, not to mention the infantry artillery.

In this era, a fortress was born that could effectively resist the attack of artillery and other thermal weapons, with less than one-eighth of the opponent's personnel, and resisted the attack of 8 times the army for several months, which was still in the era of thermal weapons.

Many people believe that the fortress should be a large-scale strengthening of artillery, before the middle of the nineteenth century, the most powerful defensive weapon, it created a lot of defensive myths, many siege battles, siege warfare with disparity in strength, are all created by the fortress, some fortress chains, and even let some powerful countries, empty more than several times the military advantage, there is no way to play it.

However, why did this fortress not appear in China, you must know that agricultural China, since the Shang and Zhou dynasties, is known for its defensive power exceeding its offensive power.

There is a lot of discussion about this on the Internet, many people think that the defense of the fortress is too strong, which is the reason why he was not born, and some people say that it is a big city and there are many people, so the fortress is not necessary, and some people will even say that in the late Tang Dynasty, if the fortress is everywhere, there will be no unified China, and when the time comes, China will appear, and countries like Europe will stand in a forest, because the difficulty of attacking the city increases.

On the Internet, a lot of discussions are relatively messy, but for the fortress, there is a unified understanding, if it is the end of the Ming Dynasty, the fortress was born in China, and after the use of the Northeast, many things can be solved.

In the later period of the Ming Dynasty, the threat of the Manchu Qing Dynasty spent a lot of effort in Liaodong, and built various castles, and important fortresses such as Daling River and Ningguang were the most important, but these fortresses all became a stale formation, under the siege of the Qing soldiers, they became a tool for the Qing soldiers to encircle and send reinforcements, and a strong castle, instead, became an iron jar and a tool for loading dead bodies, so it caused the ruin of the entire front.

If there were fortresses at that time, in the era of the Manchu Dynasty's semi-firearms, a part of the fortresses would be enough to solve most of the problems, at least, the Qing army attacked some cities, it was impossible to capture them, and the strong defense of the cities would make the Qing army be beaten full of bags.

But in the end, it has not yet appeared, and most netizens believe that the reason why the fortress did not appear is because China's defense is strong enough, and there is no need to be strong.

For the military, Zhao Xin only knows a little about it, and he was really persuaded by this view, but on the entire Internet, there is really no explanation, and under the premise of using glutinous rice porridge as the adhesive, there is no way to build a very high.

In the era of Internet discussions, cement has become a very common thing, all aspects of life are inseparable from cement, some people, just go out for a turn, you can buy cement back, in their opinion, cement seems to be commonly used in daily life.

Most people do not realize that in ancient China, there was no cement, in fact, in ancient China, there was no cement at all, and there was not even the most primitive, ancient Roman mortar.

In ancient China, yellow mud and glutinous rice porridge have always been used as binders, which have been used in China for thousands of years, or even longer, and their viscosity is really not that big, and it is easy to have problems when building taller buildings, especially the city walls.

The city wall is a large building, the thickness required is very large, the weight is also huge, the buildings that can be built in the past, the city wall is seven or eight meters high, the weight is already quite large, if it is 20 meters or 30 meters, the pressure on the entire city wall will be very large. , if you are not careful, it will collapse, and when the time comes, you will collapse without others attacking the city.

The huge self-weight, so that the ancient city wall, which is not high in strength, is easy to collapse, even if it is the Great Wall of the World Miracle, his absolute height will not be very high, the beacon tower is mostly built in a higher place, compared to the ordinary city wall, a little higher, not more than 10 meters high.

It is precisely because of the dialogue between Sun Ji and Xue Yu that Zhao Xin faintly grasped the fundamental reason why a fortress with a strong degree of defense like the fortress did not appear in China again.

It's just such a simple, unbalanced technology tree, so that the entire technology tree has no cement, and without cement, there is no possibility of giving birth to a fortress.

In ancient Rome and ancient Babylon, when cement-like adhesives appeared, China was still using yellow mud for a long time, and even in the 80s of later generations, there was also the use of yellow mud for a long time.

The ancient buildings of the whole China, except for a small number of wooden structures, general masonry structures, rarely can survive for a long time, especially large buildings, few are higher than ten meters, there is a saying that in order to avoid being higher than the main hall of the imperial palace, but in fact, it is not so high,

Occasionally, there are buildings of one or two hundred meters, but in addition to being built against the mountain, the maximum relative height is less than ten meters, or the tower.

The tower is one of the few large buildings that can be built, the higher the place, the smaller, the lighter the weight, the tower span is small, a lot of towers, there are only a few squares inside, at most a dozen squares, the super tower is really not much.

If you have a little knowledge of buildings, you will know that it is also a small area, for load-bearing, for the top, the requirements are not high, and the smaller the space, the effect of earthquake resistance is also very good.

In an earthquake self-rescue, the most important point is to find a small crotch room such as a bathroom or kitchen under the premise that there is no way to escape in the event of an earthquake, and take shelter under a relatively solid table or bed, so as to avoid problems and ensure safety.

The Colosseum in ancient Rome, with a height of 57 meters at its highest point, is definitely not seen in China. It's not that there are no buildings of more than 100 meters in ancient China, but there is nothing else except some wooden.

Zhao Xin also knows more about history, the Ming Dynasty is actually very closely related to the West, because the Ming Dynasty's porcelain, tea, silk, is very popular, the route to the East, is really a golden route, a large amount of silver, a steady flow into China, but also let the Ming Dynasty at that time, quickly from the Song and Yuan Dynasty copper standard, to the silver standard, silver has become a general equivalent to measure income.

China does not produce silver, and there are not many silver producers in the surrounding area except Japan, so before the Ming Dynasty, all gold and silver were precious metals and rarely circulated in the mainstream system.

The three major South American high-yield crops, red-coated cannons, imitations, clocks, glass products, etc., make no sense that the fortress did not enter China, perhaps it did, but it did not come in with cement.

The fortress can also be used as an advanced military facility, which can be brought into China by some ostentatious ones, but when you see China's beautiful buildings, who will bring cement, not only is it too cheap, you can't make any money, but it is also too troublesome.

Perhaps this is the real reason, China because this science and technology tree is not lit, and missed the opportunity to turn the tide, in the war of different races, if cement appeared in China earlier, large-scale popularization, maybe, the historical fate of the whole of China, will change.