The best hero of the Three Kingdoms

Chapter 630 Beheading Cao Cao's Yin Soldiers, Liu Feng Was Wounded ([-])

Liu Feng couldn't explain clearly for a while.After all, this requires the use of a lot of scientific knowledge of later generations.One of the most important points is resonance.To put it simply, when the frequency remains the same, the amplitude will increase, that is, the amplitude of the vibration of the object will increase. Originally, it may only vibrate by one thousandth of a millimeter when vibrating, and the vibration is basically not felt, but as As the frequency increases, the amplitude increases, and the amplitude increases by a thousand times, ten thousand times. Imagine that a section of railroad vibrates at most a few millimeters when a train passes by, but what happens when the vibration amplitude reaches one decimeter?The rails broke and the train derailed.

The reason why trains in later generations need to be slow when passing the bridge is that they are afraid of increasing the amplitude and then trampling the bridge.At this time, Liu Feng ordered the army to step on the ground and keep the same pace, that is to keep the frequency consistent and then increase the amplitude.If the ground is very solid and there are no gaps, then no matter how the horses keep the same frequency, no matter how many horses step on it, but if there is a hole below, the ground may collapse.

In fact, the success rate of this method is not high.Some ancient tombs may be hidden tens of meters below the ground, and the thickness of the ground is far from comparable to that of a seemingly very strong bridge.Now Liu Feng is also helpless, he doesn't want to be beaten completely passively, so he can only rely on this method to fight.

In his opinion, those soldiers walked underground. Some ancient tombs may be buried very deep, but it is impossible to connect the ancient tombs underground. The other places are opened by the soldiers themselves. It cannot be too deep, otherwise the project will be huge and consume a lot Human and financial resources are not worth it.On the whole, Liu Feng felt that his method was barely feasible. [

Guo Jia, Xu Shu and others were a little confused, but the lord didn't say anything, it seemed that there was something unspeakable, and they didn't pursue it. They just strengthened the guard of the soldiers and persuaded Liu Feng to return to Chang'an.

How could Liu Feng leave here easily? If Cao Cao really planned to use Yin soldiers to fight, he would be as talented as Guo Jia and as clever as Xu Shu in this battle, and the hope of victory was extremely slim.What's more, the underground palace where the treasure is hidden is here now. I am afraid that Cao Cao's soldiers are attacking him on the one hand, and on the other hand, they have the idea of ​​​​the underground palace.In this battle, relying on the authentic sneak attack, they have a high probability of success. They captured the lotus, took away the key, and took away the treasure in the underground palace in one fell swoop.

That night, the shadow army sent back news that Cao Cao's [-] soldiers and horses disappeared seventy miles away.

Liu Feng immediately ordered the soldiers to gallop at seventy li.

At the same time, Lin Chuang, Liao Hua, and Zhou Yu were ordered to stand by and take precautions around them.At the same time, Zhao Yun, who was hiding behind Liao Hua, led the cavalry to search for caves in the mountains seventy miles away.Based on Liu Feng's limited understanding of tomb robbers, it seems that most of the tombs are in deep mountains and old forests. The Sili area is where the imperial palace is located. Even though Cao Cao's dark soldiers cannot be found at this time, it is still necessary to block the robbery caves to stop Cao Cao The army and horses returned, and secondly, these robbery holes can be said to be traps, which are not good for the Orion for some people who enter the deep mountains.

After doing all this, Liu Feng felt a little more at ease, waiting for the opponent's attack to come.

Guo Jia, Xu Shu and others also realized that the opponent's soldiers and horses could not disappear suddenly, if the heavens couldn't, they would have fallen into the earth.Although the two of them didn't understand why Liu Feng kept the horses stamping at the same pace, they roughly knew that the lord intended to trample the ground and then trample the underground tunnel out.The two wanted to dissuade them, but they saw that the lord seemed to be a little sure, and they didn't fully understand the lord's intentions, so they kept their thoughts in their hearts for the time being.

In the second question, at noon, the Shadow Army sent back a message, and suddenly fell into it when the soldiers were trampled seventy miles away from Luoyang.Then it was discovered that it was a tunnel, more than [-] meters above the ground, a tunnel leading to Luoyang City.

Liu Feng was overjoyed, and immediately ordered the soldiers to move forward along the tunnel, and ordered more than a thousand shadow troops to open the way, followed by the soldiers of the Shenji Battalion.At the same time, a large number of soldiers patrolled the place where the treasure underground palace and the tunnel were found, and if they found that there were enemy troops crawling out of the ground, they would kill them immediately.

After flipping through the order, Liu Feng's hanging heart finally stabilized.The interception from the rear of the soldiers in the tunnel will inevitably force the soldiers and horses in the tunnel to show up. It is extremely difficult to fight in the tunnel, so the soldiers must take the opportunity to climb out of the ground. At this time, the patrolling soldiers on the ground will play a role.

Not long after, good news came.The shadow army met Cao Cao's soldiers and horses in the tunnel, and they shot arrows with great skill. At the same time, they filled the tunnel with soil to block it. Some soldiers came up with the idea of ​​using smoke.

There wasn't much air in the tunnel, so those Yin soldiers appeared from time to time.One is to adjust the direction, and the other is for ventilation.

At this time, a large amount of smoke entered it, and Cao Cao's soldiers had no choice but to break through desperately, and some soldiers dug upwards, but in this way, the air was consumed more and more.Ordinary people can hold their breath for 2 minutes, which is considered a long time. At this time, under the chaos of the army, more than ten thousand soldiers died of suffocation in the tunnel.Many soldiers climbed out of the ground and surrendered.

Liu Feng took the time to go down the zone and checked, and found that many soldiers were tearing their throats with their eyes wide open, and his heart jumped.Fifteen thousand people died of suffocation.If 5000 people were killed in a battle on the battlefield, it would not shock Liu Feng so much, but the 5000 people were completely suffocated here, seeing the flushed faces of those soldiers, The screaming for help seems to reproduce the tragic situation at that time.People can't die but nod their heads, but killing people like this really hurts peace!

Zhao Yun on the side also looked sad.Originally following Liu Feng's order, any soldier crawling out of the ground would be killed immediately.But later, I saw many soldiers crying, and many elders crying and begging to save the soldiers underground, begging the soldiers not to smoke. That scene moved Zhao Yun, and moved a iron-blooded general.Zhao Yundang immediately ordered the soldiers to dig the ground and continuously expand the holes so that the soldiers in the tunnel could breathe.At the same time, the soldiers who entered the ground were ordered to stop smoking.In just a quarter of an hour, when the smoke stopped and the tunnel was dug, many soldiers still died tragically inside.

Zhao Yun was the first one to go inside and saw the tragic scene of many people suffocating to death, his body trembled and he almost sat on the ground!

"Cremation!" Liu Feng ordered immediately.Then return to the palace.

Cao Cao's dark soldiers gave Liu Feng an idea.The third checkpoint requires two keys to open together, but the underground palace is connected to the cave, so the soldiers can dig tunnels to enter the underground palace.Then enter the treasure room from the underground palace.Tomb robbers will get lost in it, but not if it is an army.Let all the soldiers stand hand in hand, tens of thousands of people enter it, enough to fill the tunnel, how can they lose their way!After arranging all this, Liu Feng returned to Luoyang immediately.

Chen Meiren, Huarong, Lianhua and other women returned one after another.It is rumored that that night, Liu Feng had several nightmares, and in the end it was a few women who lit lamps and prayed for blessings before Liu Feng fell asleep peacefully. [