Peek at my diary, Cao Cao dominates the Three Kingdoms

But Jiang Qi's partial division didn't actually have much impact on the overall situation of the battle.

Inside Cao Jun's camp.

Jiang Ji, the chief minister of the prime minister, stood up and said to Cao Cao: "My lord, the scouts reported today that Gao Gan and Yuan Xi's army is only ten days away from us, and Yuan Tan's army from Qinghe County has also arrived. Wei County border.

If our army can't take Yecheng, we should have made plans to leave here earlier... Otherwise, we will be pinned down by the enemy at that time, and I am afraid that we will be in a dilemma, and we will not be able to leave even if we want to. "

Gao Gan, Yuan Xi, Wuhuan, and Yuan Tan had a total of [-] to [-] troops, plus the [-] to [-] main forces in Yecheng, the total strength was especially higher than Cao's army.

Although the overall quality of Yuan Jun's soldiers is not as good as Cao Jun's, they are now fighting at home, so it is easy to get supplies.

Although Cao Jun's supply line took the Baigou waterway, which saved a lot of trouble, the grain road was still very long, and it was easy to be robbed by Yuan Jun.Once the food and grass are cut off, Cao Jun is afraid that he will not be much better than Yuan Jun in Guandu, and maybe he will be hurt.

"Retire?" Cao Cao was very unwilling.

They have already reached the base of Yecheng and surrounded Yuan Shao, so if they retreat like this, no one will be reconciled to it.

But if he doesn't withdraw, if his family's wealth falls here, I'm afraid there will be nowhere to cry.

But Yecheng is indeed too strong, it is difficult to chew it down in a short time.

In the absence of weapons that can destroy the city wall, the soldiers can only use their flesh and blood to fill it with their lives. There are many examples of siege warfare in history that lasted for a year and a half...

Lao Cao was now in a dilemma, he still asked unwillingly: "Everyone, is there really no way to conquer Yecheng?"

Seeing Cao Cao's extremely unwilling appearance, Lu Yan also hesitated in his heart: "Do you want to use gunpowder to attack the city at this time?"

gunpowder!yes!The general supervisor has already experimented with gunpowder!

Originally, the midfielder is not a complicated thing. As long as you experiment more, the best ratio is actually easy to find out.

But Lu Yan still hesitated about whether to use gunpowder to attack the city.

Among them, the biggest doubt is what should they do after breaking through Ye City?

If gunpowder is used to attack the city, the city wall will definitely collapse... If the city wall collapses, then the city will have no danger to defend.

After I waited for someone to go in and kill Yuan Shao, what happened next?

Yuan Shao died in the hands of Cao Cao, Yuan Jun will definitely go crazy under the leadership of Yuan Shao's son and nephew.

When the time comes, facing a dozen or 20 Yuan Jun soldiers who are crazy, how can Cao Cao defend the city of Ye, whose walls have collapsed?

Even if he could defeat Yuan Jun, his casualties would probably be very heavy, and the gain outweighs the loss...

Breaking through Yecheng, but Yuan Shao escaped?

Then he led an army of more than 20 to [-] to fight back?Yecheng, which is also no longer safe to defend, is also tasteless.And if his main force has been dragged here, if Sun Quan, Liu Biao and others take the opportunity to attack, wouldn't they be in a dilemma again.

After breaking through Yecheng and killing Yuan Shao, they immediately retreated?

Then Yuan Shao was already a dying person, so why bother to make a fuss and expose his ace weapon?

After thinking about it, Lu Yan was still vacillating, and his expression happened to be fully seen by Guo Jia beside him.

Guo Jia lightly touched Lu Yan's arm, tilted his head and asked, "Changsheng, is there anything you can do?"

Guo Jia's voice was not loud, but his movements were clearly seen by Cao Cao who was standing in the main position.

Following Guo Jia's head tilt, Cao Cao also focused his attention on Lu Yan. Seeing Lu Yan's hesitation to Guo Jia, Cao Cao immediately knew what Lu Yan must have in mind!

"Sir, do you have a plan to destroy the city?" Cao Cao asked expectantly.

Lu Yan hesitated for a while, but still opened his mouth to answer: "Mr. Cao, I have a question... If we break through Yecheng and face Yuan Jun's 10,000+ army, how should we deal with it?"

Cao Cao was taken aback for a moment, and blurted out: "Fighting head-on, when have we ever been afraid of Yuan Shao?"

"If Yuan Shao dies, Yuan Jun will definitely attack our army crazily...even if he can win, it will be a miserable victory."

"But if Yuan Shao survives, he will lead an army of 10,000+ and never fight us decisively. He just drags our main force in Hebei... What if other princes take the opportunity to attack us behind us?"

"This..." Lao Cao was speechless for a while when he heard the words.

At this time, Xi Zhicai suddenly said: "If we can break through Ye City and kill Yuan Shao, then there will be a turning point for this matter!"

After thinking for a while, Guo Jia added: "Once Yuan Shao dies, who is most likely to inherit Yuan Shao's legacy?"

When Lu Yan heard the words, a flash of inspiration flashed in his mind, and he slapped his thigh hard with a "snap" and said, "I thought of it! I thought of it! Hahaha!"

"Hiss!!!" Guo Jia gasped, grinned and said to Lu Yan, "I said longevity...can you pat your own thigh next time?"

Lu Yan looked back at Guo Jia's wrinkled face, and quickly apologized: "I'm sorry, I slipped my hand just now..."

Cao Cao couldn't wait to ask: "Mr. Lu, what did you think of?"

After organizing his speech for a while, Lu Yan replied: "Yuan Shao has always loved his youngest son, Yuan Shang! Yuan Shao will definitely appoint Yuan Shang to inherit his foundation before he dies.

As the eldest son, Yuan Tan was definitely not convinced.

After Yuan Shang succeeded to the throne, he would definitely not be at ease with Yuan Tan.

If we continue to exert pressure, the two of them may temporarily put aside their time to cooperate in order to resist foreign enemies.

But if we suddenly withdraw and leave at this time, the two brothers will definitely fight because of their fear of each other without any interference from outside forces! "

Zhuge Liang, Fazheng and Yang Xiu were stunned, and said to themselves: "Can it still be like this?!"

Chapter 281 It only takes a moment to break the city!

But after Lu Yan said so much, there is still a hurdle that cannot be avoided.

Therefore, Xun You asked the doubts in everyone's mind: "But Lu Huqi, the city of Ye is high, deep, and well-defended...We can't even break the city, so how can we kill Yuan Shao?"

"Actually, there's no need to kill him. He'll burp by himself in two or three years..." Lu Yan muttered in his heart.

But the problem is, they want Yuan Shao to die right now, and they are in a hurry...

If you want to kill Yuan Shao, you must at least break the city first... If you can't break the city of Ye before the arrival of the army, then this time, the Northern Expedition that mobilizes the army and consumes a lot of money may be in vain.This is the biggest doubt and worry in everyone's mind.

Lu Yan smiled slightly, and said, "Don't worry, Gongda, I have my own way to destroy the city."

Xun You nodded, and asked again: "Also, after breaking the city, how can we prevent Yuan Shao from running away?"

Although Cao Jun besieged Yecheng on all sides, if the tens of thousands of troops in the city rushed out, it would not be easy to stop them.

At that time, Yuan Shao would not be able to find him as long as he was wearing the armor of a soldier and mixed in with the army.

Lu Yan replied again: "Give me a few days to prepare, and with the help of night, I can destroy the city wall in an instant.

When the city wall collapsed, the cavalry could rush into Yuan Shao's mansion at the fastest speed, and by surprise, Yuan Shao definitely had no time to escape. "

"Mr. Lu, are you really so sure?" Cao Cao reconfirmed.

"Eighty or ninety percent!" Lu Yan replied affirmatively.

Now that Lu Yan was so confident, Cao Cao no longer doubted, "In that case, Zhao Yun, Xiahoulan, Zhang Liao, Xiahouyuan!"

Hearing Cao Cao's roll call, Zhao Yun and the other four immediately strode forward, clasped their fists and said, "The last general is here!"

"Let the four of you lead the cavalry of the headquarters and be ready for night raids at any time!"

"Here!"

After receiving the order, Xia Houyuan asked doubtfully again: "But Lu Hussar, what shall we use as a signal then?"

Lu Yan replied: "Take the light of the fire and the loud noise as the name, but be more careful on the gravel."

"Gravel?" Xia Houyuan was very puzzled, and a big question mark appeared in the hearts of the others.

But Lu Yan didn't explain, and they didn't dare to ask more.

With Zhao Yun, Zhang Liao, Xia Houlan and Xia Houyuan leading away, Cao Cao also dismissed the meeting.

After Lu Yan left the tent of the Chinese army, he found several scouts from the Dragon Rider Battalion, and ordered them to return to Chenliu as quickly as possible to bring the gunpowder.

At the same time, Lu Yan also recruited all the artisans accompanying the army and asked them to make tin cans for gunpowder.

Gunpowder is a mixture of potassium nitrate, sulfur, and charcoal.

The reason this mixture burns so easily is because potassium nitrate is an oxidizing agent, releasing oxygen when heated.

Sulfur and charcoal are easily oxidized and are common reducing agents.When they are mixed and burned in an optimal ratio, the oxidation-reduction reaction proceeds rapidly, and high heat and a large amount of gas will be released during the reaction.

At this time, the gunpowder is placed in a limited space, and when it burns, its volume suddenly expands, increasing to thousands of times, and an explosion will occur.This is how black powder burns and explodes.

Just dig a slightly deeper hole under the city wall and put explosives under or near the city wall. Once there is enough black powder to detonate, the city wall will definitely not be able to withstand the power of the explosion and collapse.

Black powder combined with tunnel blasting can completely blow down city walls, and it has been used in many battlefields in later generations.

After figuring out the tactics, all Lu Yan has to do is wait for the gunpowder to arrive.

Fortunately, with the efforts of the scouts, Lu Yan did not wait too long.

The scouts were all one man and three horses, and under the whip of the horse, it took less than five days to bring a hundred catties of gunpowder to Lu Yan.

The gunpowder is wrapped in a layer of paper on the inside, and wrapped in oilcloth on the outside, which is very well sealed.

But even so, Lu Yan couldn't help sweating on his forehead when he saw them... But these are all caused by Lu Yan's psychological factors, and the black powder will not spontaneously ignite and explode due to some bumps.

Putting the gunpowder into the tin cans prepared in advance, and mixing some gunpowder with paper to make a long lead wire, Lu Yan went to a deserted place alone to conduct experiments.

"Boom!!!"

There was a violent explosion and a violent flash of white light. Accompanied by shock waves and mud splashing everywhere, Lu Yan finally breathed a sigh of relief and secretly said: "It's done!"

At this moment, Boss Cao was looking at the floor plan of Yecheng in his tent, when a "thunder" sound suddenly came from a distance, interrupting Lao Cao's thinking, "Thunder is thundering, is it going to rain?"

Thinking that the rain would affect his actions, Cao Cao opened the tent and went out after thinking for a while, deciding to check the weather conditions.

"If it rains, I'm afraid Mr. Lu's plan will have to be delayed for a while... Eh?" Cao Cao stepped out and looked at the sky, "No, the sun is so bright, why does it look like it's going to rain at all?"

When Lu Yan returned to Daying, he happened to see Cao Cao who was puzzled, and said, "Mr. Cao, you can act tonight."

"Can we act tonight?!" Cao Cao's eyes flashed, and he ignored the strange thunder just now, and said, "Okay, I will immediately notify Miaocai, Wenyuan. Zilong and Ziheng will be there. Please sir!"

"Here!" Lu Yan answered with cupped hands, turned and left.

......

The moon is dark and the wind is high tonight, which is a good time to do something.

Lu Yan led a group of craftsmen and sneaked under the city wall under the cover of night with an engineer shovel.

People in this era generally have night blindness, which means that they cannot see clearly or see things at all in dim light or at night.

But the craftsmen eat very well on weekdays,

On weekdays, green leafy foods, eggs, animal livers, etc. are all eaten, so these people basically do not have night blindness.

Under the cover of darkness, more than a dozen craftsmen quickly dug the tunnel for the explosives with the modern artifact sapper shovel.

Put more than a dozen dynamite jars in, and if the city wall doesn't collapse, Lu Yan can even broadcast his meal upside down live.

After confirming that all the explosives were ambushed, Lu Yan counted down the timer and asked all the craftsmen to ignite the fuzes at the same time!

The lead time is less than 1 minute. At this time, how far everyone can run depends entirely on personal ability...

The fuse was ignited, and a little flame came out.

The voice of "呵呵呵!!!" sounded to Lu Yan's ears, it was no different from the footsteps of the god of death!

These craftsmen didn't know if they were too nervous, but they stared at the sparks from the fuzes and commented: "It's so beautiful!"

"Yes, it's so beautiful!"

Lu Yan couldn't bear it anymore, and shouted loudly: "Why are you standing there in a daze! Run away!!! You're going to die!"

"Ah! Will people die?"

"Run!"

As soon as they heard that someone was about to die, the group of craftsmen immediately turned around and ran away.

"boom!!!"

"boom!!!"

"boom!!!"

And just when they crossed the trench and just ran out of a range of more than [-] meters, there were several shocking "thunders" behind them! ! !

Chapter 282 Yuan Benchu's Last Face

Zhao Yun and others are quietly waiting for Lu Yan's "signal" in the dark