The divine arm crossbow, the flying fire crow, and these long-range weapons were secretly developed by Li Su in the past one or two years, so he brought so much to Gan Ning's guerrilla fleet.

Therefore, after Taishici's last tentative attack defeat, Li Su only developed a targeted new weapon in the past two months, which is obviously more powerful than the above two, and is more suitable to restrain Zhou Yu's existing water war tactics.

Some of these new weapons were only slightly improved, while others were drastic inventions.

The most important one is the original "stand pole thunder" that can be used for both pole and can be stimulated to float downstream after fuze, and explode after delaying for several seconds.

There were mines in ancient China, so the technical content of these things was not against the sky. In history, the martial arts works in the mid-Ming Dynasty recorded a large number of mines, such as "Huanjianglong", "Water-under Dragon", or the kind of delayed fuse (half floated on the water and exposed the water surface to obtain oxygen, and the fuse slowly burned and exploded when it burned out)

There were also mines in the late Southern Song Dynasty, but they were more primitive and old, just a wooden barrel with gunpowder, which was not as reliable as the mid-Ming Dynasty. This thing was also exaggerated in "Age of Discovery OL", which was to throw a gunpowder barrel from the stern when the warship was sailing.

Although Li Su may not be able to cast cannons in this life, and it is even more impossible to create seamless steel pipe muskets, since there is gunpowder, it is still not difficult to create a medicine barrel mine.

His usual ideas are also very clear: as a liberal arts student who does not understand specific research and development, he never expects to develop hot weapons for field battles in land battles, at most, he only uses hot weapons technology trees in water battles and offensive and defensive cities.

The reason why he built the first mine weapon of mankind did not choose the "floating thunder" of traditional history, but rather the rare "pole thunder".

On the one hand, Li Su felt that when Zhuge Liang and Huang Yueying were not around, it was too difficult to expect him to quickly develop a lightning fuse. The quality and stability would definitely not be able to achieve the effect of "the enemy ship explodes when it hits a floating powder barrel."

Tie the powder barrel to the long pole and head towards the enemy ship. If you hit hard, it will explode. It is easier to achieve and detonate more stably.

On the other hand, this is also related to the defeat of Taishi Ci against Zhou Yu in October. Zhou Yu's mastery of the tactic of "using a pole to prevent enemy arson ships from colliding with fire attacks" in that water battle is no less than that of Li Su, the "primitive inventor of tactics" (of course Li Su was also copied by Li Guangbi of the Tang Dynasty).

This made Li Su a little worried at the time: Will the tactic Zhou Yu learn lead to a decisive battle, Zhou Yu accidentally attacked the stick of the Five-Tooth Battleship, and achieved a strong defensive effect.

As we all know, to show off your power by playing sticks, you must reach within five meters of your own five-tooth warship or even closer to the enemy ship.

If Zhou Yu had reacted quickly enough, even if Li Su was caught off guard and sank a few ships, he would immediately deal with the moves and ordered the Wu army's warships to support the five-tooth warship and keep the distance between the two sides. Then wouldn't the stick beating no longer reach the enemy ship?

Then Li Su thought: Don’t you, Zhou Yu, like to plagiarize the arson pole tactics that I invented? Let’s add some materials to the fire-proof pole!

As a result, the new batch of poles of the Han army were added longer, and a wooden barrel weighing from fifty to eighty pounds was inserted on its head. There was a layer of partition in the wooden barrel to divide the space inside the barrel into two parts in size.

The large part of the space is filled with dozens of kilograms of black gunpowder, and twenty kilograms of quicklime are spread on it. The small part of the space is filled with some natural acid liquid such as concentrated acetic acid.

Once this long pole with a gunpowder barrel hits an enemy ship, the sharp iron-packed part of the pole head will penetrate the top cover of the wooden barrel and the acid/lime partition, lime and acid liquid, and the water will instantly generate heat, and then detonate the gunpowder before the gunpowder gets damp.

The chemical principle of this method is very smooth, of course there will be troubles in actual mass production. During Li Su's initial experiment, he also had a failure of "the impact was too violent, the wooden barrel was broken down directly, the lime had not emitted enough heat, and the gunpowder had been soaked in the river water and was damp."

In a nutshell, there will be a dud of detonation failure. This problem is almost impossible to completely avoid before establishing a modern industrial system. It can only be expected that craftsmen will be able to make perfect after they produce more, and the process will be as standardized as possible to improve the yield rate.

Even if the war is about to start, the batch of pole mines that were rushing to work in Li Su's army had only a yield rate of about 80%. If you go to the battlefield, 20% of duds will definitely not explode.

Moreover, considering this very close combat distance, even though Li Su had the opportunity to make the amount of medicine in the wooden barrel larger and the power of the explosion was greater, he still had to keep it a little to prevent his ship from exploding.

After all, this is not a floating mine, and it is impossible to ensure that one's own people are far away when detonating. If the enemy ship is blown out a large crack two meters long, with the high conduction efficiency of water to the blasting pressure, one's ships five meters away may also break a few feet long.

In the final trade-off, Li Suyifang's brace gunpowder barrel has a maximum charge of no more than 30 kilograms, equivalent to about seven kilograms. Considering the relatively primitive black gunpowder blasting efficiency of this era, it is estimated that it is equivalent to at most two kilograms of TNT equivalent.

There are also some small thunders, the barrel weighs less than fifty kilograms, and the charge is more than ten kilograms, which is less than one kilogram of TNT.

If you have no idea about this number, you can refer to the fact that most aerospace torpedoes during World War II were 250 kilograms of TNT.

All Li Su had to deal with was a wooden boat, and he could barely see the charge of less than one percent of the aviation torpedo. During the test, he exploded through the wooden boards of the enemy ship more than one foot thick and exploded a crack that was ten feet long, which was no problem at all.

The siege is to break directly and kill in seconds. If a big hole is blown by a fighter, water will not stop. If the building ship is an old-fashioned building ship, water will be fatal.

If the newly built tower ships of the princes after the watertight compartment technology spread in 195, they could still expect to reserve buoyancy to save themselves, but the speed suddenly decreased and the maneuvered would be certain.

At the end of October, the test was basically passed, and mass production began.

Before mass production, Li Su sent a secret order to Zhuge Jin and Zhang Yi in advance, asking them to transport large quantities of black gunpowder and other key materials from the military center of Yizhou Road to Yiling. Then Li Su organized production on site in Yiling, transporting more than 10,000 kilograms of gunpowder and making hundreds of large barrels.

Liu Bei's camp still has a good control over the production of sensitive raw materials. Although it moved its capital to Chang'an three years ago, the main gunpowder workshops and steel forging were still placed in Jianwei County. Li Su was the old nest of military farming when he was the governor of Yizhou. There were only a small number of workshops in Chang'an, which the emperor's confidants directly controlled.

The other newly occupied areas such as Liangzhou and Jingzhou do not have such confidential military industrial centers.

Only Zhuge Jin and Zhang Yi, the military base in Jianwei County, Yizhou, can manage it, and is controlled by Li Su.

...

Because this mine weapon is expensive, consumes a lot of precious black gunpowder, and is also very dangerous, it has never been fully equipped in the previous military running-in training.

It was not until now, on the eve of the expedition of Zhou Yu that Li Su decided to spend a lot of money to let the soldiers see the real guys in the pre-war mobilization training on the fifth day of the Lunar New Year.

Several major water war generals have been taken care of by Li Su, so they are very serious when admonishing the soldiers.

Taishici and Huang Zhong both gave strict instructions to the pinned mine soldiers and officers under their subordinates:

"Be careful! Today's training is serious, and it's ten times more than the fake training bucket you practiced in the previous seven or eight days! You must try to stretch the rod as far as possible, more than five meters away from your ship, and stab the enemy ship hard!

And be careful to spread your ship immediately and keep a distance when you poke it. Never continue to lean on it, otherwise you will be sank yourself!"

"Who! Who makes you hold the strut in the middle of the pole in order to save effort? Four people operate a pole, and leave a maximum of eight feet behind the pole, and extend the front five feet away! Those who violate the order will cut!"

It turned out that some sailors were careless during the training. In order to save effort when holding the strut, they held the strut too far, resulting in a shortening of the attack distance and the danger of their own side, so they were scolded and punished by the officers. Any movements that did not obey the command, even if they did not cause any consequences, were stopped in time, and they had to draw thirty military sticks.

When they first started training, they only used fake thunders with equal counterweights and loaded with sand. Later, they used one-tenth of the loading of training bullets two days ago, which was also to save materials.

Today's final training was still just taking out fifty barrels of full charge to ensure that there were miners. Each sequel trained two barrels of thunder, which could cover about twenty-five thunders and two hundred thunders. More substitute thunders can only watch and observe.

This training volume is at least more expensive than the training ammunition of the Beiyang Navy, and the time is in a hurry.

As the pole mines were actually tested, and seeing several old ships as target ships were blown off, the Han army pole drivers were all dumbfounded and realized the terrifying power of the full range.

In the subsequent training, there is no need for Taishi Ci and Huang Zhong to whip the marching method again. Everyone was afraid of death and obediently stretched the pole to hit the enemy ship as far as possible.

Some soldiers even used their cleverness to detour the attacker's ship to the upstream of the water flow, and then hit the target ship with a pole with a thunder, the attacker immediately stretched away and threw away the pole with the thunder.

In this way, because lime is heated and heated when it encounters acid, it takes several seconds to delay the attacker, and the attacker can take advantage of these few seconds to widen the distance between the two sides, making himself safer.

In the final tactical training statistics, Li Su was relieved to see that there was a mine soldier leaning against a six-meter-long pole, achieving an attack distance of more than ten meters. After the mine was poked on the gang of the target ship, the two inserted together and continued to drift downstream. The attacker relied on the counter-support force to stretch out, and pulled a few more feet away before detonation.

"Very good. It turns out that fear of death can inspire soldiers to spontaneously find safer methods. When you practice to this level, you can take it out and fight Zhou Yu, so you don't have to worry about being in a hurry at the end of the battle." Li Su was generally satisfied with the final gun sharpening exercise.

...

Another day later, the sixth day of October.

On the second day of the lunar month, the news of Gan Ning burning and destroying several counties in Jiangxi was sent to the Jiangling Army through the countercurrent clutch and non-stop messenger.

Sun Ce and Zhou Yu were also shocked when they saw the emergency response from the rear.

"What? Gan Ning can even divide the manpower to make a big sabotage behind us?" Sun Ce slapped his desk angrily.

Zhou Yu was careful and realized that there might be a fraud. He immediately asked the messenger: "Is the news reliable? If the officials in E County, Qichun bluffed and exaggerated the enemy's situation for their own safety, they would not be spared after they returned! Tell me carefully, how many troops did Gan Ning bring in total?"

The messenger was also helpless: "The subordinates were just messengers, and Zhu Fujun's letter should be written."

Sun Ce also realized it and quickly handed Zhou Yu the urgent letter he had at hand and asked Zhou Yu to read it.

Zhou Yu quickly found the data he cared about, glanced at it, and exclaimed: "Fifty big ships of twelve meter? Impossible? There are not even twelve meter fighters, and this is all catching up with some small and medium-sized building ships.

Such a large ship carried fifty people. How many troops did Gan Ning have? Or did he meet some of Zhou Tai's troops who broke through the siege when he passed by Hanyang, and wanted to disrupt our army?"

No matter what, Zhou Yu completely attached importance to this problem. He knew that he must give his brother a countermeasure and solve this problem.

Zhou Yu thought to himself: "Forget it, no matter how bluffing Gan Ning is or how many tricks Li Su has. It's no big deal to temporarily rescue my main navy. In the cold winter, our army will be troubled by siege the city, and the enemy will be troubled by siege the city.

If there are more than 10,000 people in Jiangling City, it is absolutely impossible to be captured by the enemy in a short period of time. No matter how bad the situation is, it can last until mid-February. Li Su can't distribute so many soldiers to attack Jiangling.

And as long as my main navy force is twisted into an iron fist on the surface of the Yangtze River, and does not give Li Su the chance to tempt and disperse our army and defeat each of us, I will not be afraid of anything!"

After understanding this, Zhou Yu advised: "Brother, let's confirm the situation again. The worst case is to leave 20,000 General Huang's 20,000 people patrolling the Han River, defending the Xia River side, and leaving a little people to guard Jiangling.

We will bring 60,000 main forces to join forces, whether it is Nabaqiu Hanyang or annihilate Ganning, 60,000 people are on the Yangtze River, and there are large ships and elite weapons. No one can do anything to us."

Sun Ce also felt so, but he still had to show the necessary caution, so he spent two more days investigating military information, holding a meeting to discuss, and arranging his defense plans after attacking with Zhou Yu.

On January 8th, the final decision was finally made. Zhou Yu and Sun Ce led Dong to Chen Wu, Lu Meng and Song Qian, a total of 60,000 sailors, and sat on the most elite large warship of the Eastern Wu, sailed down from Jiangjinkou Shuizhai, ready to act according to the opportunity.
Chapter completed!