Due to the tight time, the construction of the tunnel began the next day.

In fact, even Qin Chuan himself stays at the theoretical level. To truly understand, you must explore it in practice or even in actual combat... After all, these are exchanged for the blood and life of the volunteer soldiers on the battlefield, and it does not mean that they can be used or used correctly if they know it.

But it should be said that because Qin Chuan knows the relevant knowledge, he can always find practical and simple methods faster and better when solving problems.

For example, the issue of drinking water storage... If you want to ensure that you are in the tunnel for a long enough time and can survive, then drinking water is necessary, and it is even more important than food.

However, it is very inconvenient to store drinking water in the tunnel, which takes up space and makes the already narrow tunnel very crowded, and it is easy to be overturned and lost due to the darkness.

This problem is actually very simple to solve. Dig a few pits in the tunnel, then transport a few gasoline barrels into it and buried it... A perfect water storage tank is ready, and it does not even affect the movement of soldiers on it after covering it.

For example, the communication problem... There is no signal in the tunnel, the radio cannot be used, and it is unrealistic to pull the telephone line, because the telephone line is easily found and cut by the enemy. Once it is cut, the soldiers in the tunnel cannot come out to repair it... Doing this is like throwing himself into a trap.

The solution to this problem is to use a few steel bars into the tunnel from the outside as antennas... Only a small piece of steel bars needs to be released outside, and they can be covered with stones and plants. When a war starts, there will be bullets, shells and broken cement concrete fortifications everywhere. Who would pay attention to this small piece of steel bars?

If it really doesn't work, Qin Chuan also told them an emergency method, such as if the signal is bad or if something else cannot communicate, they will tie a wire to the grenade and throw it out. Of course, don't pull this grenade to burn... At first glance, you will think it is a stinky bomb, and no one will be interested in picking it up and taking a look.

Colonel Slain and Major General Neumann were both stunned when they heard these thoughts.

"If it weren't for your resume, I would have thought you had fought a similar battle somewhere!" said Colonel Slain.

"Or, do you have a relative who participated in the last war?" asked Major General Neumann.

Some German soldiers thought World War I was a shame, so they called it "the last war".

"Oh, yes!" Qin Chuan replied: "My uncle lost a leg in the last war. He always snatched his past with us, especially some things in the trench. Part of my methods came from him!"

The First World War was trench warfare. In some ways, trench warfare is somewhat similar to tunnel warfare. They also dug tunnels and hid underground... So Qin Chuan is right to say this.

However, they are just "some similar". Trench warfare is far less difficult than tunnel warfare. The reason is that the fortifications of trench warfare are mainly used to avoid cannons. The enemy can come out of underground bunkers and live and move in the trenches without firing artillery.

However, the tunnel warfare was the enemy occupying the ground fortifications, and the soldiers could only hide underground and persist, which was not the same level in terms of physiological and psychological pressure.

"No wonder!" Major General Neumann said to Qin Chuan with a complicated expression: "If you have the opportunity to go back, I will pay tribute to your uncle on my behalf. I have participated in that war, maybe we are still comrades!"

"Okay, general!" Qin Chuan replied quickly, "But you are unlikely to be comrades, because he is a engineer!"

This is the lie of Major General Neumann Qinchuan Fun. He knew that Major General Neumann was an infantry major during the war, so that he would avoid being exposed when asked about the number.

"Oh, I'm sorry I can't be your uncle's comrade!" Major General Neuman patted Qin Chuan on the shoulder and said, "But I'm very glad to be your comrade. One day... I hope I have the opportunity to meet your uncle and reminisce about the past!"

Qin Chuan couldn't help but complain secretly when he heard this, but he still responded: "Of course, General, this is my honor!"

Major General Neumann is a standard professional soldier, which can be seen from his seriousness and madness in the war... For Europeans, they can be said to be crazy if they can accept Qin Chuan's suggestions for tunnel battles. Major General Neumann is like this, and Rommel is like this, and Colonel Slein still disagrees with this approach until now, because he believes that the result of doing so is to drive his soldiers crazy before defeating the enemy.

"How could they stand that kind of darkness and helplessness!" said Colonel Slain. "Have you tried staying in there? I stayed for one night, but I couldn't stand it for just one night. This is still the case when I knew I could go out at any time and there was no danger. If there were enemies outside, they were throwing grenades inside or using flamethrowers to spray flames inside, or there was no food or medicine, the wounded would not be healed... God, this would become hell!"

"Colin!" Major General Neumann replied simply: "This is why we are better than them!"

Sometimes, pride or narcissism is also possible, but it is still necessary on the battlefield... because they think that Germans are better than other nations, so Germans who cannot do it can do it.

On the contrary, if we do not have this sense of pride or national confidence, we will think with another thinking: British and Americans can’t do it, so why can we do it?

Major General Neumann obviously belonged to the former, which made him very keen on Qin Chuan's defensive tactics, and it was not an exaggeration to say that he was obsessed with it, because he felt that this was a test of the spiritual will of the imperial warriors, and it was also a time to prove that the Germanic nation was the best nation in the world. Of course, he would not miss this opportunity.

"The construction of the tunnel must be as simple as possible!" Qin Chuan continued: "On the one hand, it is because of the short time, and on the other hand, it is because we need to build a large area, so we should use local materials as much as possible, that is, support it with wood in fragile parts..."

"But if it cannot withstand the enemy's bombardment, it will bury our soldiers alive!" Colonel Slain opposed.

"There will be casualties at any time on the battlefield!" Major General Neumann agreed with Qin Chuan: "I agree with the lieutenant's statement. If we don't hide in the tunnel, our soldiers will be directly blown into pieces by the enemy's shells! Some people who hide in the tunnel will be buried alive, but at least some people will survive!"
Chapter completed!