Jian Yong and Zhang Fei said that they used other methods to contain the Qizhai officers and soldiers, "It's just that it's different from Xi'er's method, hehe." Zhang Fei chuckled.

This made Li Mengxi curious. He didn't understand what other methods there were other than borrowing a knife to kill someone, so he asked two people to talk about it.

Zhang Fei pondered for a moment and said, "I have few soldiers and can't attack directly. I also feel that I have to use strange attacks. The easiest way to attack is water and fire. I also want to use fire to attack..."

Zhang Fei said that at that time, he first sent people during the day to find out the general layout of the official camp, how many gates there were, how high the walls were, and what the environment was like outside the camp in all directions.

Prepare supplies for fire attack.

Zhang Fei only said this, which already made Li Mengxi look at him. He didn't expect Zhang Fei, who was big and powerful, to be so rigorous.

Speaking of fire attack supplies, Zhang Fei was scratching his head after thinking about it now. He frowned and said, "I thought that setting a fire would make it impossible for the enemy to save it. The fire would start quickly and burn fiercely. In addition, the enemy would attack at night."

The soldiers could not bring much firewood to the camp, and bringing too much would be too much trouble, so I thought it would be best to get tung oil.

Tung oil burns quickly and fiercely. A pot of tung oil can burn a large area, and you don’t need to bring too much tung oil..."

Li Mengxi nodded immediately after hearing this. He thought Zhang Fei was right. For ordinary fire attacks, just stacking firewood would be enough. For advanced fire attacks such as infiltrating the enemy camp and burning the enemy's stronghold, it is not easy for soldiers to infiltrate and carry supplies with them. Therefore, it is best to

Bring a fire-setting weapon such as tung oil.

Li Mengxi took a pen and jotted down a few strokes. He interrupted Zhang Fei and asked curiously, "Third General, do you know that there is something like fire oil?"

Zhang Fei was stunned for a moment, "What is this fire oil?"

Liu Bei, Guan Yu and Jian Yong also looked over in confusion.

Li Mengxi saw that no one knew about Menghuo Oil, so he had to explain, "Menghuo Oil is an underground mineral deposit, a common mineral, either earth or stone, and Menghuo Oil is a dark, sticky ointment-like mineral. This Menghuo Oil

Oil is violent in nature. The slightest spark will explode. Once a fire breaks out, it will not be extinguished by rain or water. Even if you pour a bucket of fire oil on the river and throw a fire on the river, the whole river will catch fire..."

As the only person familiar with Menghuo oil, Li Mengxi explained the properties of Menghuo oil in very detailed and realistic terms. No one has ever seen a fire that can burn even in heavy rain, or a fire that cannot be extinguished by pouring water.

I have never seen fire floating on the river. Such powerful firepower is unheard of and sounds incredible.

It was unbelievable to others, but when the words came out of Li Mengxi's mouth, everyone completely believed that there really was such a fire.

"Our Han Dynasty has a vast land and rich resources. There may be an open-air Menghuo oil mine somewhere," Li Mengxi said with a frown, "But I don't know where the Menghuo oil is produced. Also, today, Menghuo oil may not be called Menghuo oil.

, or another name."

The Han Dynasty should have an open-pit oil mine, and it has been basically exploited and used, but firstly, they don’t know where it is, and secondly, they don’t know the name of the Menghuo oil in the world, which makes it very difficult to find Menghuo oil.

Li Mengxi thought of Luoyang again. If he asked where the most concentrated materials in the world were, it would definitely be Luoyang, the hub.

In Luoyang, it is not impossible that oil was treated as a scarce treasure by local officials and presented to the court as tribute.

If you have time, you can send someone to Luoyang to offer a large reward, maybe you can buy oil directly, and at the same time find out where the oil comes from.

Liu Bei and others only marveled at the firepower of Menghuo Oil. Only Li Mengxi knew that Menghuo Oil can not only set fires, but can also be made into Menghuo Oil Cabinets. Menghuo Oil Cabinets can defend cities and engage in water warfare.

Very sharp.

The episode about Meng Huo Oil was revealed, and Zhang Fei continued to talk about it. There was no tung oil in the army, so they had to send people to Luoyang City to buy it. Luoyang was really a good place. When I got to Luoyang City, I bought tung oil directly without much effort.

came back.

At this point, Li Mengxi realized a shortcoming. It was good to be able to buy tung oil temporarily, but where to buy it in the wilderness, so the army must keep some in case of emergency.

Judging from Zhang Fei's experience, tung oil is not only a combustion accelerant, but also an essential material necessary for special operations.

Later, Zhang Fei continued to say that after gathering information during the day and buying tung oil, the night attack began at night.

Zhang Fei proudly explained the preparations before the night attack in detail. Zhang Fei was drooling as he spoke, with excitement on his face, because he, Lao Zhang, had thought up all the preparations alone.

.

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Zhang Fei said that he ordered his soldiers to erect a few planks of wood to pretend to be a stronghold wall, and then ordered the soldiers who attacked at night to sneak towards the stronghold wall.

With such a simple simulation, a lot of problems arise.

The first problem is that the soldiers were not careful enough and their steps were crackling.

The second problem is that the shoes are wrong. Most of the soldiers wore straw sandals. The straw sandals did not fit their feet and made noisy noises when they walked.

Third, if a soldier wears armor, the armor pieces will rattle when he moves around.

Third, Zhang Fei said to himself that he found that the more people there were, the louder the noise.

Fourth, Zhang Fei said, if you look at it from a high place, if there is light from a high place, the soldiers who are lurking and approaching will have no way to escape.

After many drills, Zhang Fei figured out the method of lurking on his own. The lurking people need to be barefoot, wearing single clothes and sacks. They can lurk forward in groups of two or two at most. In the process of approaching the enemy's stronghold, the lurking people need to

Use muddy steps to slowly rub your feet against the ground as you move forward step by step, because the ground is uneven in the dark and your feet are unstable. If you fall, the noise will be loud.

Li Mengxi could understand most of these hidden methods, but only the fact that he was wearing a sack made him confused.

Li Mengxi raised his head and asked Zhang Fei doubtfully, "Third general, why do the soldiers wear sacks? Don't you think it's a burden?"

Zhang Fei suddenly felt that it was a great honor to be able to condescend to ask such a smart as a monster military strategist. A sense of intellectual superiority arose spontaneously. Zhang Fei proudly explained to Li Mengxi why he wore a sack.

This chapter is not finished yet, please click on the next page to continue reading the exciting content! The reason is that Zhang Fei discovered that if there is light from a high place, the defenders will look down from above, and the lurkers will have no way to hide.

Zhang Fei also discovered that the lurking soldiers were easily discovered while standing, but if they lay down on the ground and slowly arched forward, the person was close to the ground, and it was pitch black. At first glance, if you didn't pay attention, you wouldn't be able to see anyone.

Gu Yong was very hidden while crawling on the ground, but there was still a possibility of being seen.

Therefore, Zhang Fei had a sudden idea and asked the soldiers to put a sack or a sheet on their backs as a cover. In this way, when the soldiers crawled on the ground, they would be covered by the sheets and spread out in the dark, making it impossible to tell that they were human beings.

Li Mengxi has completely understood that this is how to use the auspicious suit! That’s it!

Zhang Fei is amazingly awesome.

Li Mengxi thought for a while, and then said to Zhang Fei, "Third general, if the sacks worn by the soldiers are painted black, they will be more concealed at night."

Zhang Fei was stunned for a moment, then smiled. He looked at Li Mengxi and praised, "I never thought of this. If I had known this, I would have done this."

Next to him, Liu Bei hesitated and interjected, "...Don't use ink, just use charcoal. The ink stinks."

Liu Bei's casual remark started a big discussion.

Li Mengxi suddenly realized that smell could actually affect the success or failure of a latent operation.

Ink is very smelly. Li Mengxi is familiar with this. The ink he bought in elementary school costs 30 cents a bottle, and it smells terrible.

The reason why odor can lead to the failure of lurking is that if the lurking person wants to assassinate the enemy commander, it turns out that the cloak of the lurking person is blackened with ink and smells terrible. The enemy commander has already fallen asleep.

, when the lurking man came close, the enemy commander's nose was sensitive and he was awakened by the smell, and then the assassination failed.

Li Mengxi remembered a piece of news. There was a thief who sneaked into someone else's house to steal things. As a result, the thief's feet were so smelly that he woke up the owner. The owner got up and beat the thief violently.

It cannot be ruled out that some people are very sensitive to smells, especially people who have been fighting for a long time, and they will be very sensitive to the smell of blood. This requires that, firstly, the infiltration person should not have a heavy smell all over his body, and secondly, it is best to

, the infiltrator will use a brand new weapon once he takes action, so that the smell of blood on the weapon will not be noticed by others.

On the contrary, Li Mengxi came up with counter-mo camp tactics.

It's pitch black at night, and vision is greatly restricted at night.

Humans have five senses, namely hearing, vision, touch, taste and smell.

In the case of preventing nighttime penetration, taste is useless. No one can detect the smell molecules in the air by sticking out their tongue, not even snakes. Touch is useless, no one can use their hands to vibrate slightly from the ground.

Seismographs are not that difficult to determine the source and direction of vibrations.

Therefore, the only available senses left are vision, smell, and hearing.

As for vision, it cannot be ruled out that some people are gifted and can open their eyes to the sun and see clearly. Some people can see at night and have extremely good eyesight.

Searching for such talented strangers with excellent eyesight and having them guard the four-corner arrow towers of the camp at night will directly reduce the possibility of the enemy's lurking and infiltrating the camp by several percent.

Also, from a technical perspective, the reason why you cannot see clearly at night is because the light at night is not good. On the contrary, if you can make the light at night sufficient, there will be no possibility for the enemy to invade the camp.

Li Mengxi thought that a circle of bonfires could be lit around the camp. In this way, with a bright fire zone, it would be difficult for the enemy to lurk quietly. And if there is a thunderstorm, you can use torches to surround the wall of the camp.

A circle around the tree with a torch stand to protect it from rain, and the fire is positioned high to illuminate a wide range, which is better than a bonfire.

But there is a problem. It takes a lot of firewood to light a fire all night long, and the lighting range of the torch stand is still limited. The torch stand can indeed guard against one or two enemy troops, but if a large group of enemy troops sneak up, they will not be able to see it.

At that time, a large number of people suddenly appeared under the firelight. The warning distance of the torch stand was really too short.

Li Mengxi thought of a powerful tool that could save firewood and greatly extend the lighting range - a searchlight.

According to the existing technology, you can make a sealed smooth metal cylinder and burn it with a tung oil lamp or alcohol lamp. In this way, the light inside is illuminated by the smooth metal. This is how a simple searchlight is made.

With the advent of searchlights, visual defense has reached its peak.

Then, people with excellent hearing and vision will have people with excellent hearing. Select some talents with excellent hearing and make them serve as night watch sentries. In this way, the defense can be improved by several percent.

Moving to the technical level, the method of using sound to warn the enemy is as if ancient soldiers would fall asleep with their quivers on their pillows. This is because the vibrations of solid objects are transmitted quickly, and tens of thousands of horses galloping ten miles away can be transmitted to human ears in an instant.

Therefore, we can start with military regulations and make the soldiers sleep with their heads on hard objects. This will greatly enhance the soldiers' early warning capabilities.

Li Mengxi has not tested how far the human ear can hear the sound of horse hooves or how far it can hear the sound of footsteps. He has some doubts about the detection efficiency of this method.

In the sound enhancement technology, Li Mengxi thought of the stethoscope. The stethoscope is directly connected to the ear bone, and the sound collection efficiency is very high.

A stethoscope can be made with a rubber tube and a thin metal shell. Thin metal shells should not be difficult. Ancient craftsmen had the technique of blowing gold foil. If the gold foil is too soft, just hammer it into an iron sheet and keep grinding it until it is sharp enough.

It's as thin as paper.

It's a bit difficult to use a rubber tube, but it seems to work with a hard tube. Anyway, after Beethoven became deaf, he directly used wooden sticks to connect the sound from the strings to the ear bones.
To be continued...