Chapter 281 Break the city, it only takes a moment!
But after Lu Yan said so much, there was still a hurdle he couldn't get around.
So Xun You asked everyone's doubts: "But Lu Qiaoqi, this city of Ye is high and deep, with complete defenses... We can't even break the city, so how can we kill Yuan Shao?"
"Actually, there is no need to kill him. He will burp on his own in two or three years..." Lu Yan muttered in his heart.
But the problem is, they want Yuan Shao to die now, and they are very anxious...
If you want to kill Yuan Shao, you must at least capture the city first... If Ye City cannot be captured before the army arrives, then this massive and costly Northern Expedition may be in vain. This is the biggest doubt in everyone's mind and
worry.
Lu Yan smiled slightly and said: "Don't worry, Gongda, I have my own way to break the city."
Xun You nodded and asked again: "Also, after the city is broken, how can we prevent Yuan Shao from running away?"
Although Cao's army besieged Yecheng from all sides, if tens of thousands of troops rushed out of the city, it would not be easy to stop them.
When Yuan Shao comes, he may not be able to find him as long as he wears the uniform of a soldier and hangs out among the army.
Lu Yan replied again: "Give me a few days to prepare, and under the cover of night, I can destroy the city wall in an instant.
When the city wall collapses, the cavalry can rush into Yuan Shao's mansion as quickly as possible. Yuan Shao will definitely not have time to escape due to the surprise."
"Mr. Lu, are you really so sure?" Cao Cao confirmed again.
"Nine or ten!" Lu Yan replied affirmatively.
Since Lu Yan was so confident, Cao Cao no longer doubted, "That's it, Zhao Yun, Xia Houlan, Zhang Liao, Xia Houyuan!"
After hearing Cao Cao's roll call, Zhao Yun and the other four people immediately strode out, clasping their fists and saying, "The general is here!"
"Let the four of you lead the cavalry and be prepared for night attacks at any time!"
"Here!"
After receiving the order, Xia Houyuan asked doubtfully: "But Lu Qiaoqi, what will we use as a signal then?"
Lu Yan replied: "Take the fire and loud noise as a signal, but be more careful with the gravel on the ground."
"Gravel?" Xia Houyuan was very confused, and a big question mark appeared in the minds of others.
But Lu Yan didn't explain, and they didn't dare to ask more questions.
As Zhao Yun, Zhang Liao, Xia Houlan, and Xia Houyuan took the order, Cao Cao also dismissed the meeting.
After Lu Yan left the Chinese army's tent, he found several scouts from the Dragon Cavalry Battalion and ordered them to return to Chenliu as quickly as possible to bring gunpowder.
At the same time, Lu Yan also recruited all the craftsmen who accompanied the army and asked them to make tin cans containing gunpowder.
Gunpowder is a mixture of three powders: potassium nitrate, sulfur, and charcoal.
The reason why this mixture is extremely flammable is that potassium nitrate is an oxidant and releases oxygen when heated.
Sulfur and carbon are easily oxidized and are common reducing agents. When they are mixed and burned in an optimal ratio, the oxidation-reduction reaction will proceed rapidly, and high heat and a large amount of gas will be released during the reaction.
At this time, gunpowder is placed in a limited space. When it burns, its volume suddenly expands to thousands of times and explodes. This is the principle of black gunpowder combustion and explosion.
Just dig a slightly deeper pit under the city wall and place explosives under or near the city wall. Once enough black powder is detonated, the city wall will be unable to withstand the power of the explosion and collapse.
Black powder combined with tunnel blasting can completely blow down city walls, and it was used on many battlefields in later generations.
After figuring out the tactics, all Lu Yan had to do was wait for the gunpowder to arrive.
Fortunately, with the efforts of the scouts, Lu Yan did not have to wait too long.
Several scouts, each with one person and three horses, worked hard and quickly, and in less than five days, they brought hundreds of kilograms of gunpowder to Lu Yan.
These gunpowders are wrapped in a layer of paper on the inside, and then 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 were Lu Yan's psychological factors, and the black powder would not spontaneously ignite and explode because of some bumps.
After putting gunpowder into a prepared iron can and mixing some gunpowder with paper to make a long lead, Lu Yan went to an uninhabited place alone to conduct experiments.
"Boom!!!"
There was a violent explosion and a violent flash of white light, accompanied by a shock wave and mud splashing everywhere. Lu Yan finally breathed a sigh of relief and said to himself: "It's done!"
At this moment, Boss Cao was looking at the floor plan of Yecheng in his tent. Suddenly there was a sound of "muffled thunder" in the distance, interrupting Lao Cao's thinking, "It's thundering, is it going to rain?"
Thinking that the rain would affect his actions, Cao Cao thought for a moment before he opened the tent and walked out, 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 walked out and looked at the sky, "No, the sun is so bright, how can it possibly rain?"
Lu Yan returned to the camp and happened to see the puzzled Cao Cao, and said: "Mr. Cao, you can take action tonight."
"We can take action tonight?!" Cao Cao's eyes flashed, and he forgot about the strange thunder just now, and said: "Okay, I will immediately inform Miaocai, Wenyuan, Zilong and Ziheng.
Please sir!”
"Here!" Lu Yan responded, turning around and leaving.
...
The moon is dark tonight and the wind is high, which is a good time to cause trouble.
Lu Yan led a group of craftsmen and carried engineering shovels to sneak under the city wall under the cover of night.
People in this era generally suffer from night blindness, which means they cannot see clearly or see things clearly in dim light or at night.
But the craftsmen prepare very good meals on weekdays.
They usually eat green leafy foods, eggs, animal livers, etc., so they basically don’t suffer from night blindness.
Under the cover of darkness, a dozen craftsmen used modern artifacts such as engineer shovels to quickly dig the tunnel for hiding the explosives.
A dozen explosive cans were put in. If the city wall didn't collapse, Lu Yan could live broadcast his meal while standing on his head.
After confirming that all the explosives had been laid, Lu Yan counted down and asked all the craftsmen to light the fuses at the same time!
The lead time is less than one minute. At this time, how far everyone can run depends entirely on their individual ability...
The fuse was ignited and a little flame appeared.
The sound of "Bah! Bah!!!!" sounded to Lu Yan's ears like the footsteps of the God of Death!
I don't know if these craftsmen were too nervous, but they actually stared at the sparks from the burning fuses and commented: "It's so beautiful!"
"Yes, it's so beautiful!"
Lu Yan couldn't help it anymore and shouted loudly: "Why are you standing there in a daze! Run! You're going to kill someone!"
"Ah! Will someone die?"
"Run!"
As soon as they heard that someone was going to die, the craftsmen immediately turned around and ran away.
"boom!!!"
"boom!!!"
"boom!!!"
And just when they crossed the trench and ran out of the range of more than 100 meters, there were several huge "thunders" exploding behind them!!!
－－－－－－Digression－－－－－
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