"'Three-stage strike,? I don't know how?" Without waiting for Zhu Su to speak, Li Wenzhong asked with interest. He is also an old man who fights people, and he knows that the tactics that can arouse the interest of a famous general of Xu Da's level must have their merits.

"It was deduced by Lao Wu and used to deal with the situation of the middle route army in ambush at that time." But it was Zhu Di, who was excited, who answered first. "It's nothing more than dividing the musketeers into three columns and firing in turns, so as to keep the firepower continuous and suppress the cavalry charge head-on......

As he spoke, he described the three strikes in detail again.

Li Wenzhong listened attentively, and nodded after listening: "This method is ingenious, compared to bows and arrows, the fire gun is simple to practice, and it is quick to get started. If an ordinary archer shoots a heavy bow, he will not be able to shoot up to five arrows. And the fire gun does not waste muscle strength, and in this respect, it can indeed be continuous."

"So, this method can really break the Northern Yuan cavalry?" Zhu Di was pleasantly surprised.

"Hehe, not really. One is that the firearm has a limited range and is slow to reload. If the enemy charges, one person may only be able to fire two shots. It is used to use the method of three hits, and this distance can also fill the corpse of the enemy. If you want to really achieve an endless effect, I am afraid that it will only take ten and twenty strikes. But in that case, to resist the same number of cavalry, you need several times as many firearms as cavalry, and the cost is too great, and the gains outweigh the losses."

"The second is that after several firearms, the barrel is often overheated and cannot be used again, and it needs to be cooled down. You can't keep firing like that."

"The third is that this method requires the fire gun to be in danger and not chaotic, and has the ability to collapse in front of Mount Tai and not change color. It is necessary to know that the prestige of cavalry charging is often earth-shattering, and even warriors in a hundred battles are often angry. To be able to face the frontal charge of the cavalry and continue to use the three-stage attack in a step-by-step manner, such an army must be an extremely remarkable elite. If you have such an elite, you can think of other ways to break the cavalry, and you don't have to risk using these three strikes head-on."

is worthy of being a famous general, and after listening to a few words, he analyzed the advantages and disadvantages of the three-stage attack so clearly, Zhu Su immediately admired Li Wenzhong. Who said that people who traveled back in time to ancient times were the smartest people? Even with the bonus of later generations, he is still an idiot.

"The kid thought of this method behind closed doors, and I don't know if I can use it, but I have become my Ming Zhao Kuo. Now when I listen to Brother Bao'er, I know that I am a frog at the bottom of the well. Taught!" Zhu Su thanked Li Wenzhong.

Li Wenzhong hurriedly waved his hand, and Xu Da also smiled, "Why should the Fifth Highness be so humble. You have not been on the battlefield to be able to come up with a way to deal with the situation on the spot, although there are flaws, but it is extremely rare, in time you will become my Ming Ming famous general, for me to open up the territory of the Ming Dynasty."

Zhu Su smiled awkwardly. He wasn't interested in going into battle. However, Zhu Di next to him saw that Zhu Su got this evaluation, and glanced at him and seemed to be quite envious.

"So, firecrackers don't work as well as ordinary infantry cavalry? Then Uncle Xu, how did you get out of the encirclement?" Zhu on the side asked.

"The Third Highness is not necessarily true of this. The firebolt naturally has the function of the firebolt. Just like after the defeat of the Northern Expedition this time, I used the method of taking the camp step by step, delaying the Yuan army with the camp, and retreating while fighting."

….

"If I can know the method of these three strikes in advance, learn from the king to protect the defeat on the way to retreat, and then set up a three-stage attack on the front to delay the cavalry with horses and antlers......

As he spoke, Xu Da patted his knee with a little excitement. "That Wang Baobao is full of success in one battle, and he will definitely lead the cavalry army to attack my handsome banner regardless of his relatives. I can then use the three-stage attack method to ambush the enemy with a sudden burst of powerful firepower. Maybe he can shoot Wang Baobao to death in front of the army."

Xu Da's tone was quite regretful. Zhu Su admired it in his heart. When he said the three-stage attack, he thought of the example of the Oda family's firearms against the Takeda Akabi cavalry during the Warring States period of Japan. In this example, the Oda family set up a bait to lure the Takeda cavalry, and waited for work at ease, supplemented by rejecting horses and other things to block the cavalry, so that they could complete their work in one battle, and completely launched the prestige of the three-stage attack.

It is basically the same as the application method envisioned by Xu Da. If Zhu Su's idea is just a talk on paper, and has no practical value, then Xu Da is this paper

Shang Tan Bing, with his military talents, was transformed into a concrete and feasible battle plan.

This made Zhu Su feel quite ashamed of getting an axe.

"So, there's still a lot to be done with firecrackers!" Zhu Di also said excitedly on the side. When he heard Zhu Su propose a three-stage attack, he was full of joy and thought that it was a good method, and the three-stage attack was criticized by Li Wenzhong just now, which really made him feel like he had been struck by lightning. I just thought that my vision was not at home, and I studied the rags as a treasure for so long.

It wasn't until Fu heard Xu Da's affirmation of the three-stage attack that he regained his spirits.

Xu Da didn't answer, Li Wenzhong on the side had always been close to Zhu Di, but he affirmed him. Zhu Li invited Xu Da and his son to sit down, and several people sat down here together and began to tell some interesting stories about the Northern Expedition.

"I've solved your three questions." Xu Yungong suddenly leaned over to Zhu Su and whispered, telling Zhu Su the answer, and adding a sentence. "But Erl."

"Oh?" Zhu Su grinned. "Is it a solution, or is it a trial? Don't just give the answer, don't you talk about the solution?"

Xu Yungong froze. Where did he have the solution? Among the three questions, except for the first chicken and rabbit cage that he solved by himself, the remaining two were solved by his sister Xu Miaoyun. That's it, each question also took several days, and the last question was pumped into the water, and there was no clue about it.

In the end, I really had to use a stupid method, counting one by one, to try to find the answer.

"I...... I don't believe you have a definite solution!" Xu Yungong still said stiffly.

Zhu Su smiled indifferently, used his fingers as a pen, and dipped in wine to solve the three practical problems for Xu Yungong step by step. Seeing Zhu Su's moment, he solved the chicken and rabbit cage question, which was hundreds of times faster than the calculation, and Xu Yungong was already dizzying.

But he can still understand the solution of the chicken and rabbit in the same cage, and when the two people in the back ask each other and ask about the water pumping, Xu Yungong feels like a mountain looking up: he knows every one of those words, but when they are combined, he doesn't even understand a sentence!

He wanted to suspect that Zhu Su was writing scribble, but Zhu Su seemed to be really trying to teach him, and while writing, he was still reading to him with words in his mouth. Even if Xu Yungong doesn't understand, he can feel the meticulousness of the logic!

"Got it?" Finally solved the three questions, Zhu Su breathed a sigh of relief. Writing out numbers in Chinese characters to list equations is really troublesome. In the simple three questions, he actually wrote most of the table case, and Zhu Su thought that he must extend the Arabic numerals another day.

"......" Xu Yungong's forehead was full of sweat stains, looking at the handwriting written by Zhu Su in wine on the table. The half-table case completely solved these three problems, and it took three pieces of paper to solve the chickens and rabbits in the same cage...... What kind of knowledge does this have to be? What kind of immortal means do you have to have?

He raised his eyes and glanced at Zhu Su, who seemed to have just done a trivial thing, and could not hide the horror and admiration in his eyes, and then quickly lowered his head, and memorized Zhu Su's problem-solving process into his mind while the wine was still dry.

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