Cao Zhang's army of 30,000 retreated to Guandu, where he began to build fortifications in order to await the arrival of Cao Ang's army.

At this time, Sima Yi had already united many wealthy clans in the four northern states, and formed a powerful army under the leadership of Zhu Shuo, all armed equipment, except for some special units, was comparable to the gunpowder army in Luoyang.

When Yuan Yun found out that the other party actually had eighty tanks, he was beating a drum in his heart, in order to balance the strength of Yecheng and Luoyang, Cao Cao had some oil refineries set up in Jizhou, and now there are oil and tanks, so that Sima Yi's army immediately increased in strength.

What's even more troublesome is that in the returned intelligence, it is clearly pointed out that Sima Yi is manufacturing gasoline weapons in large quantities, and without gunpowder, gasoline weapons have become his first choice.

The current four northern states, except for the annexation of the state, are all controlled by Sima Yi, coupled with the support of the local clans, so that the north has achieved unprecedented unification of the upper and lower levels, in this case, the imperial court represented by Cao Ang immediately lost its prestige, and there was no second choice except for a hard war.

Sima Yi seemed to attach great importance to Cao Zhang's behavior of building fortifications in Guandu, so the army led by Zhu Shuo quickly marched to Liyang City, and the sword pointed directly to the west of Guandu, which made Cao Ang very worried, so when the army was not fully prepared, he left Luoyang and began to support Guandu through the river, and the supply of baggage at this time could only barely be maintained.

The 20,000-strong army of Pingnan led by Guo Jia also entered the Jingzhou territory through Wancheng shortly after Cao Ang's departure, thus containing Lu Xun in Yangzhou in order to relieve the defensive pressure of Xiahou Yuan in the Xudu territory.

Now only Yuan Yun is left in Luoyang City and has not moved, because the previous two armies have taken away almost all the baggage, and Yuan Yun needs to repair for another month to replenish it, and for this goal, the entire Luoyang workshop is working day and night.

Looking at the rebuilt gunpowder workshop, Yuan Yun only felt extremely worried, in order to restore the supply of the army as soon as possible, Cao Ang placed the gunpowder workshop directly on the ground, only built a high wall on the periphery, and then set up a large number of forbidden troops to protect it.

This kind of security is very simple, if Sima Yi's meticulous work through trebuchets or artillery weapons, throwing gasoline bombs into it, it is likely to explode again, and in order to prevent such a thing from happening, Xu You's intelligence department has been running for lunch all year round, and people in Luoyang City will be imprisoned every day.

"Master, this is also a helpless thing, if the gunpowder workshop wants to resume production quickly, there is no time to dig a hole in the ground, so it can only be carried out in the open air like this." When Deng Ai spoke, the buns in his mouth had not yet been eaten, so his voice seemed very dull.

Cao Chong was also holding a bun at this time, and after listening to Deng Ai's words, he smiled bitterly and said: "In fact, all the precautions that should be done have been done, Your Majesty's personal army will patrol around the workshop every day, and the nearby five miles are set as forbidden areas. ”

Yuan Yun sighed, then smiled bitterly, and said: "Sima Yi is smart, in order to slow down our reaction, he chose to destroy the gunpowder workshop in Luoyang, which really caused us to have a lot of armaments that could not be replenished, and we could only rely on stocks to the armed forces, which was equivalent to standing on a level with him. ”

Deng Ai had already eaten all the buns at this time, and after listening to Yuan Yun's words, he immediately continued: "After a long time, the military equipment in the north will be overtaken by Luoyang, and it will be up to him to see what tricks Sima Yi has at that time." ”

Cao Chong shook his head and said: "I've always been worried about Sima Yi's premeditated plan in Liaodong, there must be a large number of workshops established there, and I'm also worried about the leakage of the secret of gunpowder, if that's the case, we really don't have much advantage in Luoyang." ”

Yuan Yun glanced at Cao Chong, who was frowning nervously, then smiled and said, "It's okay, even if Sima Yi plans to copy a Luoyang in Liaodong, I dare to guarantee that he will not succeed." ”

"Why?" Deng Ai and Cao Chong questioned at the same time.

Yuan Yun smiled and pointed his finger in the four directions of southeast, northwest and northwest, and then returned: "The biggest reason why Luoyang can develop so vigorously is because it is the center of the world, with convenient transportation on all sides, and it is not difficult for all kinds of businessmen from all over the world to gather here, but if Luoyang is moved to Liaodong, I am afraid it will be a big problem, who would be willing to trek through mountains and rivers to do business in such a remote place?"

Without the exchange of these merchants, it is impossible to develop and grow, and how can a city based on workshops survive without trade? Think about the food we consumed every day in Luoyang back then, and you can guess the consumption in between.

Therefore, even if Liaodong builds a city full of workshops and wants to operate for a long time, I think Sima Yi can only last for a year or two at most, and then he will have to use the output of other places in the north to continue to maintain, and that kind of consumption will soon make those northern nobles begin to regret rebellion. ”

After explaining this, Zhuge Liang had already arranged the sandbox in Yuan Yun's study, and then beckoned a few people over with a smile, and the feather fan in his hand was constantly inciting, showing that the master seemed to be in a very good mood.

Yuan Yun arrived at the edge of the sandbox, glanced at Zhuge Liang with a smile on his face, and suddenly asked with some confusion: "Why does Brother Kong Ming seem so happy, this is going to war, and I don't know how many people will die." ”

Zhuge Liang was still smiling, and then pointed to the position of Guandu with the feather fan in his hand, and then said: "This nail will come out sooner or later, and the reason why Liang feels happy is because when this happened, our Majesty was in the prime of life and had enough energy to deal with it."

And through this rebellion, the future will be a great thing for the lord and you will be a great thing, and when the rebellion is pacified, presumably the lord you will go to the field again to live your leisurely life, then your majesty will really understand who is the safest, so after this time, I believe that the lord will not be suppressed again, and you will really become the mainstay of the empire, which Your Majesty will know best, and will also give you the greatest trust, and ensure the absolute status of the Yuan family, so as to deter Xiaoxiao.

So with so many good things, Ryo was of course very happy. ”

Yuan Yun is not as optimistic as Zhuge Liang, Cao Ang is really too suspicious now, the Cao Ang who trusted him very much before, almost as if he never existed, this is probably what he must become as an emperor.

As for Zhuge Liang's other evaluations of Cao Ang, Yuan Yun is still very convinced, now Cao Ang is in the prime of life, this rebellion may be a disaster for the people, but for an emperor like Cao Ang, it is indeed the best opportunity to establish prestige.

As long as Sima Yi is put down and the clans in the north are wiped out, Cao Ang's first baptism as an emperor will be truly completed, and Cao Ang will be more confident at that time, which can also make the Great Wei Empire have a more perfect future.

Now the three armies have been divided, as long as each road can play a role, then the north controlled by Sima Yi will inevitably collapse in the near future, among which Cao Ang took the strongest troops, not only many veterans of the year are in charge, the soldiers are also the strongest arm, Guo Jia went to deal with Lu Xun in Yangzhou, and also got the support of the Sun family, so some local clans are also willing to continue to be loyal to the imperial court, so there is no need to worry about the chance of victory.

And the Xuzhou defense force led by himself, Yuan Yun was a little worried, after all, the armament is insufficient now, his supply of 20,000 people is very small, and even the equipment of gunpowder and ammunition is not complete, the only thing that is more assured is that the rifle and bullets are sufficient, but when he thinks of the tank that Sima Yi has, an inexplicable worry immediately rises.

In addition, the territory of Xuzhou has developed over the years, from a strategic location to an economic area with a focus on shipping, and many fortifications have been dismantled because of hindering development, which will make it more difficult to deal with Sima Yi's invasion.

Now Chen Deng is already stepping up the construction of fortifications, but the time is too short, and with Sima Yi's shrewdness, he can only launch an attack if he can let Xuzhou repair the fortifications, so before this, he will inevitably take action, and now Yuan Yun only asks that before Sima Yi takes further action, he can arrive with 20,000 reinforcements.

When looking at the map of Xuzhou in his mind, Yuan Yun's heart suddenly moved, the wars of this era were basically focused on the mainland, but this was not the case in later generations, and the attacks of sea and land were sometimes more threatening than land.

If he relied on Diao Chan's large number of warships and threw a force into Sima Yi's rear of Liaodong, it would definitely cause him great trouble, and at that time he considered whether to save Liaodong or continue to wave his army south.

This kind of establishment of the Marine Corps does not exist in this era, but fortunately, in the initial training of the Gunpowder Army, Yuan Yun put forward the combat quality on the waterway, which basically many northern soldiers could not adapt to, but also required them to adapt to the transportation through large ships.

And with this ability, then it is not impossible to transport troops from Xuzhou to Liaodong, the reason why such a combat method is not considered in this era, first, because it is impossible to guarantee the logistics baggage, but can not form a large-scale corps, and second, the lack of mobile means of the troops, so it is impossible to ensure a rapid transfer, resulting in a long-distance surprise attack on the rear of the enemy is simply a fantasy.

But now the gunpowder army is completely different, because the appearance of some marching food such as canned meat has ensured the conditions for the survival of large corps, coupled with the large-scale improvement of sea transportation, it has become possible to transport large quantities of personnel, so that the surprise attack on Liaodong has become a very possible thing.

Sima Yi would never have thought of this, after all, his understanding of military affairs was still confined in this era, so he would definitely not have guessed that Yuan Yun could appear in Liaodong with 20,000 gunpowder troops.

"Why is Brother Yuan so worried, just a Sima Yi, back then, our brothers even had a hero like Liu Bei in their hands, why should we care about the hot brains of some northern clans?" While speaking, Xu Yi had already walked into the study, and Xiahou Nan behind him was holding a thick account book.

Looking at the account book, Yuan Yun suddenly showed a happy look, since these two people in charge of logistics have arrived, then the 20,000 people who proved that he brought to Xuzhou can finally set off.