Although Xun You's plan seems conservative, it is also an opportunity.

At the moment when the attack was hopeless, Guan Yu could only hope for the power of trebuchets and new firearms.

Because of its large size, trebuchets are disassembled into parts when transported, and then reassembled on the battlefield.

Because of the special tactics and technical requirements, the trebuchet team is often listed separately in the Wei army array, as if it has become the fourth branch of the army in addition to the infantry army, the horse army and the naval army.

And when the lethal weapons it can throw are not only stones, its role has also been greatly improved, and then, Guo Peng called the trebuchet in the name of the cannon, and since then, the soldiers who use the trebuchet have been called artillery soldiers within the Wei army.

There are really signs of becoming a fourth branch of the military.

The Heaven-Shaking Thunder, which has been improving over the years, is a throwing weapon, and the fierce fire oil canister that Guo Peng regards as a powerful weapon is also a throwing weapon, which can also use the power of fire and deflagration to carry out long-range attacks, which may have greater significance than a simple huge stone.

Especially when facing the Shu army defenders in the Sword Pavilion Pass.

Guan Yu didn't wait too long, so he waited for the trebuchet to come.

After the trebuchets were sent one by one, the wrinkles on Guan Yu's face also stretched a lot.

Watching the artillerymen assemble the trebuchet very skillfully, Guan Yu began to easily stroke his proud hair again.

After all, this is a beautiful hair that has been praised by Guo Peng, and the emperor has praised it personally, Guan Yu regards it as life, and he has to protect it with his pocket when marching and fighting.

Then Guan Yu and Xun You and other high-level commanders of the Wei army inspected the storage of various weapons transported from Hanzhong, and felt that they had a bottom in their hearts and were sure of attacking the Sword Pavilion Pass.

And Wu Yi's side is relatively less confident.

It was indeed inspiring to repel the Wei army's attack for the first time, but the soldiers were very happy, but Wu Yi was not so happy.

He knew very well that this was a tentative attack at all, and the Wei army did not contribute at all, nor did they attack strongly, but just tested his defensive strength and left.

Obviously, the Wei army had a surplus and did not intend to attack, and the rear should be very stable, and it was not subject to the compulsory orders of Wei Tianzi, so it was able to design tactics safely.

The first time it was good to repel it, but after that it was not necessarily, maybe the Wei army would become stronger and sharper, and his resistance would become more and more difficult.

For this reason, Wu Yi sent people back many times to urge the ordnance and military rations, especially arrows, rolling wood and stones and other equipment for defending the city, he believed that these things were necessary to enter a protracted war later.

Of course, Wu Yi also has other concerns.

Shu Han is not like Guo Wei, Guo Wei has enough strategic depth and far exceeds the population base of Shuzhong, and organizing a major battle of 100,000 people will not hurt the muscles and bones.

Even if the war drags on for a long time, the people cannot cultivate the land, and it does not matter if the spring plowing in the two areas is delayed, he still has the vast Central Plains and Guanzhong regions that can provide grain to the war zone.

But Shu Han is different, the population and territory are not at the same order of magnitude, Guo Wei can launch a war of 100,000 people without delaying spring ploughing, and Shu Han can't afford to fight.

An army of 100,000 people and a logistics force of more than 100,000 people directly tied about 200,000 men to the battlefield, which was almost exhaustive for the Shu Han regime, which controlled a population of only about one million.

Both the elderly and women will be forced to work in the fields after the beginning of spring, and there will inevitably be problems with grain production, and there is not much storage in the Shuzhong treasury.

The previous battles of Liangzhou and Hanzhong consumed more than half of the savings, and the battle of Nanzhong consumed a lot, and now the treasury of many places in Shuzhong has no grain in stock, which is very dangerous.

Once the war drags on, the grain in Shu cannot be replenished in large quantities, and there is likely to be a famine, once the famine appears, the army's spirit is unstable, it will be immediately broken by the Wei army, the defense line will be torn apart, and the Shu Han regime will face a desperate situation that is irretrievable.

Therefore, this war cannot exceed half a year at most, and the Wei army must be repulsed within half a year, otherwise Shu Han will starve himself to death.

Even so, Huang Quan proposed a supermobilization strategy.

That is to say, once the front line is in an emergency, whether it is Sword Pavilion or Micang Mountain or Yufu, any place is in an emergency, Liu Zhang will start a super mobilization and pull all the men to the battlefield.

No matter who it is, as long as it is a man, as long as it can still fight, no matter what profession you are engaged in, no matter what age you are, give you a weapon, all of them will be pulled up, and the more than 100,000 people who are now engaged in logistics will also be pulled up to fight, and they will definitely fight to the end.

So who's going to do the logistics?

Liu Zhang asked Huang Quan like this.

Huang Quan said very simply that let young and strong women carry grain, women are also human beings, and they have to use it as a last resort.

Wu Yi was deeply worried about this, and was really afraid that one day would come and he would engage in this super mobilization.

Wu Yi didn't know if the Wei army's strategic grain reserves were at the level of half a year, but judging from the news that the Shuzhong caravan had brought back from going to the Central Plains to do business, the situation might not be optimistic.

Under the rule of Guo Wei, the people in various places were quite wealthy, even if it was Li Shu in the countryside, there were no vegetables on his face, and there were many children in the countryside, with white hair hanging down and playing with each other, which reflected the confidence that the abundant grain production brought to the bottom Li Shu.

Only when the social economy is stable, the grain output is stable, and the political environment is stable, can the people have the confidence to have more children, and this also confirms from the side that the Guo Wei regime has sufficient confidence to launch a war.

Wu Yi was very worried, worried that he would not be able to drag down the logistics of the Wei army in half a year, but he would be able to drag Shu Han down.

This is the gap in national strength, the gap in the crushing level, if we cannot win, we will inevitably perish.

But is it really possible to win?

Wu Yi didn't know.

As far as what can be seen in front of them, the Wei army was very cautious and did not blindly launch a strong attack, even if it was a previous tentative attack, it was fully armored, everyone held a shield, and there was a basis for advancing and retreating, and it was forced to retreat after being forcibly suppressed by a large number of arrows, but the casualties were very small.

From this point of view, the Shu army could not really inflict heavy casualties on the Wei army, and could not really repel the Wei army.

That's the big question.

Wu Yi knew very well that if he couldn't really inflict great casualties on the Wei army, he couldn't repel them, but he had to go out of the city to fight......

Wu Yi had learned the combat effectiveness of the Wei army, and he still remembered how he failed when he faced Guo Peng face to face.

He remembered how the Shu army was completely defeated under the attack of the Wei army, and he knew very well that in terms of combat effectiveness in field battles, the Shu army was inferior to the Wei army, and if it did not take advantage of the geographical advantage, this battle would not be able to be fought at all.

Now the Wei army is cautious, obviously making long-term plans, and he doesn't even know what it will be like when the Wei army attacks again.

Faced with such a situation, Wu Yi, who was sitting on the dangerous pass of the Sword Pavilion, frowned.

And before he could worry for long, the Wei army made a comeback.

This time, as Wu Yi feared, the Wei army evolved, and instead of rushing forward directly with the big shield, he used a trebuchet to launch an ultra-long-range strike.

At least it was a blow launched at a distance that the bow and arrow of the Shu army could not reach.

The content of the attack was also unheard of by the Shu army.

Huge stones flew in the sky, crossed a beautiful arc, and fell fiercely inside and outside the Guancheng, bringing a huge blow to the inside and outside of the Guancheng, and a huge blow to the morale of the Shu army.

And that's not even counting the weapon, a weapon that emits a terrible thunderous sound that resounded through the sky.

This kind of weapon exploded around the soldiers of the Shu army like a thunderbolt, not only the sound, but also the violent air flow was wrapped in terrifying hidden weapons, iron sand and gravel and the like, which frightened most of the soldiers in the entire Guancheng in an instant.

Even if the sound of thunder that continued to sound one after another did not kill directly, it also deafened the ears of the Shu soldiers, and the flying gravel and iron sand brought serious abrasions to the Shu soldiers, or injuries in the eyes and mouths, which could turn people into wastes in an instant.

The air flow generated by the explosion could also blow the Shu soldiers out of the city tower in a relatively small space, and they fell off the city tower, dead and motionless.

In comparison, the more terrifying effect is that the sudden violent explosion is so loud that it is not to the level of fright, but to scare people crazy or even to death.

As soon as it exploded, it scared people to death.

One of Wu Yi's generals and several personal soldiers were scared to death in this way.