Tan Fei was surprised that His Majesty didn't know what the 'Armor Removal Wind' was, but what Zhao Yu was worried about was the devastating disaster that this unknown disease might bring, and for a moment he even flashed in his mind that if his conjecture was confirmed from Tan Fei's mouth, then the idea of ending the war immediately and returning to Jiangnan immediately showed how much he was afraid of this, and this was the Black Death, which is what modern times call the plague.

Before the advent of vaccines, the plague was undoubtedly the most terrifying nightmare of mankind. Especially in history, when some countries or regions prospered in international commerce, plagues often spread rapidly in the world through inter-regional trade. One of the first of these plagues to spread widely was the Great Plague of Justinian in 541.

It took only a year for the plague to spread throughout Europe and the Near East, where there were no defenses. In the space of a year, it claimed the lives of 15 million people, and the subsequent outbreaks of the plague increased the total number of victims of the plague to a terrible 50 million. The original outbreak of the Great Plague of Justinian originated in Egypt, an important food supply area for the whole of Europe at that time.

At that time, rats or fleas carrying the germ germ of glandular rat disease sailed to Constantinople, the capital of Eastern Rome, with merchant ships from Egypt, and quickly caused a large-scale plague in the city. Due to the lack of effective means to suppress the plague, and the Eastern Roman Emperor Justinian was bent on restoring the Roman Empire, the plague immediately spread rapidly from city to city, and then from the city to the countryside.

However, this great plague naturally did not stop at Eastern Rome, in fact, with the reconquest of the Eastern Roman Empire, as well as the Silk Road, this plague quickly spread to North Africa, Western Europe, Persia and other regions, and this plague also completely changed the history of Europe and even the world. Affected by the plague, not only did the Eastern Roman Empire's attempt to reconquer Rome end in failure, but also because of the attrition of wars and plagues, Byzantium was unable to resist the invasion of Egypt and Syria by Sassanid Persia.

In Western Europe, the impact of the Great Plague of Justinian was even greater, and the huge loss of population directly led to the arrival of the Dark Ages in the early Middle Ages. In England, the aftermath of the plague also completely destroyed the Celtic resistance to the invading Anglo-Saxons. If the impact of the Great Plague of Justinian was confined to the western part of Eurasia, the plague that broke out at the end of the Mongol Empire's reign changed world history forever.

After the Mongols ended their military conquests, the overland Silk Road, which had been abandoned by wars in the regions along the route, was finally opened again. However, in addition to bringing great economic benefits to the various Mongol khanates, this also brought great dangers. At the beginning of the XIII century, there was a massive outbreak of plague in the Annam and Java regions of Southeast Asia. Since these two regions were important transit points for maritime trade at the time, merchant ships carrying the plague sailed to Hangzhou and through here all the way north, and finally spread along the Beijing-Hangzhou Grand Canal to the capital of Yuan.

As far as Zhao Yu knew in his previous life, this terrible plague could be said to be the first major national plague in China, and its spread was almost a replica of the Great Plague of Justinian. Because there was no effective means of suppression, the plague was like entering a no-man's land, in addition to spreading widely among the people, the prince and the emperor of Dayuan in the imperial city were also infected one after another, and there were sixteen princes, and two emperors died of the plague.

However, this was only the beginning, and along the Silk Road, this unprecedented plague spread back to the Chagatai Khanate, the Ilkhanate, the Golden Horde, and through the trade and warfare of the Golden Horde, to the Rus' region, and to the Genoese colony of Kaffa in the Crimea. Later, the plague spread to Italy along the commercial activities of the Genoese and infected all of Europe.

It can be said that the impact of the Black Death on the whole of Europe and the whole world is unprecedented. The Black Death directly destroyed the Great Yuan and the Ilkhanate in the Middle East, and caused the remaining khanates to be demoralized, and led to the tragedy of continuous division and shrinking of the territory. In Europe, the Black Death directly changed the social makeup of the whole of Europe.

Therefore, Zhao Yu knew very well that the opportunity for the disease to enter China was the Mongols' war of conquest of Eurasia, and this great plague that affected the world occurred around his own time, and he was worried that he had changed the direction of history, that is, there was a possibility of an outbreak of plague in China now. The destruction of Mongol rule, and the knowledge that the shadow of the plague had subsided, was only a prelude to the Black Death.

Due to the lack of effective treatment and corresponding vaccine prevention, the Black Death began in the 14th century, that is, in the near future, the plague broke randomly in any part of the Eurasian continent. The outbreak of the Black Death in Britain and France directly led to the truce of the Hundred Years' War between the two countries, and also led to the fall of the historic Plantagenet dynasty in England.

By the fall of the Xiaoice River in the seventeenth century, the Black Death had reached a new peak. In the Ming Dynasty, due to the uninterrupted outbreak of the Black Death from the end of Wanli, the national strength and military strength of the Ming Dynasty were seriously damaged. Especially in North China in the last years of Chongzhen, its severity has reached the level of "the great epidemic, thousands of miles from north to south, north to Saiwai, south to the Yellow River, ten rooms and one escape".

However, such a tragic situation is not limited to the Ming Dynasty. At that time, the entire human race, so to speak, had no way to resist the Black Death. Around the same time in Europe, there were also outbreaks of the famous "Great Plague of Milan" and the Black Death in London. The former arguably destroyed Italy's prosperity completely, while the latter nearly brought the restored Stuart dynasty to a near-death date and led to the defeat of Britain in the Second Anglo-Dutch War.

In Eastern Europe, a severe outbreak of the Black Death in Moscow cost the city at least a third of its population. In the Americas, the Black Death was even more exaggerated. This disease, along with smallpox, another terrible disease that spread across Eurasia, wiped out almost the entire Amerindians. In short, the world is huddled in the shadow of the plague and shivering, even in modern society, although there are effective means of prevention and control, it is still as vigilant as against the enemy.

The biggest plague Zhao Hao experienced in his previous life was SARS, and he spent a period of fright, but it seemed that death was still far away from him. But when he first came to this world, he experienced the outbreak of the flu, and felt the fear of death on the plague ship, and every morning he watched the bodies of the dead patients being thrown into the sea, and he felt that it was possible that he would be next.

This experience not only allowed Zhao Yu to gain the team, but also allowed him to understand the helplessness of the ancient people against the plague, and his heart had a great shadow. Subsequently, he listed 'no open defecation' as an iron law in the army, and established and improved the medical system, and in Hangzhou, despite the opposition of his ministers, he paid for the improvement of environmental sanitation out of his own pocket, which can be said to be out of fear of the plague, and always tightened the string of epidemic prevention, in case of unexpected encounters with the plague of the century that changed the world pattern.

In ancient times, most of the unexplained illnesses were named and explained by wind evil, and when he suddenly heard Tan Fei say the word 'unloading the armor', he immediately touched the string in Zhao Yu's heart. And the word 'A' in it also indicates that this disease is related to the army, it is easy to be prevalent in the army, and it occurs from time to time in the Mongolian army, so it is even more important for him to worry, so he must find out......

Tan Fei didn't know why the little emperor was so interested in the 'Armor Removal Wind' for a while, and he also felt his nervousness and anxiety, although he wondered in his heart, he still explained it in detail.

The name of the disease is naturally related to the a, but it is really only associated with the a. Let's start with the materials of the armor, the materials used to make the armor are mainly animal skins and copper and iron, these things are directly worn on the body, and the human skin will definitely not be able to stand it. Therefore, no matter how strong the armor is, when it is used, it must be worn with a thick lining inside the armor to cushion the severe impact of the enemy's blow and reduce the friction of the armor on the human body.

Wrap and cover the armor with cloth, soft leather, or wear a cloth garment to improve comfort and reduce friction with the skin, while also slowing down the impact. Some even wear textiles on the outside to prevent damage to expensive armor on the battlefield and to protect from the sun.

When cotton was not yet popular, hemp or "silk silk" was often used to make armor linings, and there were also flax and wool, and even horsehair to wrap and make them. Obviously, these textile armors, regardless of the material, invariably look like a thin version of a down jacket. However, these textiles have a shortcoming, after being pressed layer by layer, they will lose the breathability of the textile, and they are "very covered" when worn on the body.

So will it be hot to wear such armor? And everyone knows that iron has good thermal conductivity, and iron armor will soon be hot like teppanyaki when exposed to direct sunlight. Therefore, even if you wear a piece of textile armor alone, it is actually impossible to say whether it will be hotter than wearing other armor. Therefore, in addition, the armor is very heavy, even if you move a little in winter, it will be very hot, and you will only feel even hotter when you have to wield heavy weapons on the battlefield to fight the enemy's life and death.

Because the so-called armor removal wind is actually a stroke caused by the heavy armor lining of ancient soldiers after a long period of armor-piercing battle, because the heavy armor lining is not breathable, resulting in sweat that cannot be discharged immediately, and the blood circulation is not smooth. The textile lining is basically the root cause of the occurrence of nail removal wind.

However, even so, the huge defensive effect brought by the combination of cotton inner armor and iron armor has been improved, and for soldiers on the battlefield, it can save their lives, and other problems are actually minor problems. Therefore, the soldiers were still willing to risk the wind of unloading their armor, as well as the sweltering temperature, and wore double armor to fight. After all, anyone would choose the former with the possibility of dying from the armor removal wind, or being hacked to death on the spot.

Zhao Yu understood that it was a little funny, and he also understood why there were few armor removal winds in his army. When he set up the Shuaifu Army, it was called a poor, not to mention iron armor, and there were few pairs of leather horns, and the situation did not improve until he conquered Guangzhou, but he still couldn't do everyone wear armor, so naturally there was no way to talk about this kind of wealth disease.

After arriving in Qiongzhou, it is summer all year round, and it is hot without armor, and everyone is not interested in armor. And Zhao Yu also took the opportunity to abolish the iron armor, and only issued leather armor, or half-body armor. Later, with the popularization of firearms, the need for armor was less urgent, and he simply 'invented' the plug-in type of lightweight protective armor, which was not only lightweight, but also better ventilated than armor, and had no chance to remove armor.

Although the incident was just a false alarm, which made Zhao Hao breathe a long sigh of relief, it still woke him up. Just because there is no outbreak of the plague now does not mean that it will not happen in the future, and time is at a historical juncture. He knew that once the plague broke out, the population in the south of the Yangtze River would be dense, more prone to epidemic infection, and it would be more difficult to control, and the losses would be more severe than those in the sparsely populated Jiangbei, Central Plains, and grasslands, and the restoration of the country would become an unattainable dream.

Zhao Yu pondered for a moment, took up his pen and wrote down the instructions, ordering all the armies participating in the battle to immediately deal with the battlefield, whether it was the dead people left on the battlefield, the corpses of horses or the enemy's heads used to evaluate merit, be sure to clean them up in time, and bury them deep away from the water source, and cover them with quicklime for disinfection. Sanitation should also be further strengthened in the barracks, and efforts should be made to ensure that officers and men can take hot baths to get rid of fleas and lice that breed. Rats in kitchens and granaries should also be eliminated to cut off the source of infection as much as possible.

After Zhao Yu finished writing, he still felt uneasy, now is the time when merchant ships from all over the country come to the Great Song Dynasty to trade, and it is also one of the sources of infectious diseases, so he once again put pen to paper to the governor of Shangshu Province and the state capital where the port is located, and the three cities of Guangzhou, Quanzhou and Qiongzhou respectively issued edicts, asking them to strictly inspect the maritime merchants and sailors from foreign merchant ships, especially from Annam and Java. There are no exceptions for both domestic and foreign vessels.

Those who are found to have fever, coughing up blood, coma, hallucinations, diarrhea, skin ulcers, subcutaneous bleeding, and unknown lumps in the armpits and neck are not allowed to go ashore. However, if it is found that the skin of the sick person has turned blue-black, no one is allowed to approach it, and in the event of death, the body, the ship and the cargo on which it is traveling are to be incinerated.

In the edict, it was repeatedly warned that this was the root cause of the outbreak of the plague, and that if a person was contaminated, he would die for three or five days or a few hours, and that there was no cure for it, and that it spread rapidly. If the outbreak and spread of the epidemic caused by the negligence of the local magistrate, he will be sentenced to death immediately, and his family members will be exiled to a remote military state to serve hard labor, and will never be pardoned......