On the issue of Yongzhou's defense, Zhang Xi and Zhuge Liang discussed it until late at night.

To be honest, to some extent, Zhang Xi is prepared for both.

In this regard, it is actually much better than Zhuge Liang expected.

Through the prediction of the current situation, Zhuge Liang believes that it is unlikely that Cao Wei will suddenly launch a large-scale invasion of Guanzhong under the current situation, and the most he will do is harassment.

Although Zhang Xi also judged this way, Zhang Xi has always been cautious in the use of troops, so Zhang Xi was not only prepared to deal with Cao Wei's small-scale harassment, but also prepared for Cao Wei's large-scale invasion.

In the direction of Wuguan Road, the reason why Zhang Xi was in a hurry to establish Wubao and put Liu Yin, who was good at defending, was to rely on the uniqueness of the exit of Wuguan Road, establish a blocking position in advance, rely on Wubao defense, and harden with Cao Wei's army at the exit of Wuguan Road, blocking the Wei army from entering the right Fufeng.

But this trick is easy to make in the direction of Wuguan Road, but it is not easy to do it in Tongguan.

Although Tongguan is also built on the mountain, it is true, and the terrain is also dangerous, but ten miles away from Tongguan, it is a vast Zuo Fengyi Plain.

It's not impossible for you to block Tongguan, send more than 50,000 soldiers and horses, stationed in the first ten miles of Tongguan all the year round, but you can block Tongguan, but the problem is that Zhang Xizhen doesn't have so many soldiers and horses to call.

Historically, the attack on Tongguan has always been besieged by a large army, and I have never seen anyone who sent a small force to block Tongguan and prevent Tongguan soldiers from going out of the field battle.

Therefore, for Zuo Fengyi's defense, Zhang Xi had to think about withdrawing from the twenty miles and drawing a buffer zone, which only arranged some soldiers and sentries as warnings, the purpose was never to prevent the Wei army from fighting in Tongguan, but to warn.

As for Zuo Fengyi's defense, Zhang Xi chose the combat method of luring the enemy to go deep according to the battle examples in his mind to break through Tongguan.

Set up a buffer zone in the Zuo Fengyi area, and at the same time place the northern army on both flanks of the defensive line, wait until the Wei army invades, let go of the defense of the buffer zone, lure the Cao army to go deeper, and wait until the Cao army goes deep into the position far from Tongguan, let the two wings of the northern army quickly circle the rear and close the encirclement, cutting off the Cao army's retreat.

In this way, if the Cao army invades a small force and cannot break through at all, if it is a large army invasion, Zhang Xi can retreat while fighting, and it is a big deal to give up the Zuo Fengyi area and rely on Chang'an City to hold on.

As long as the Wei army could not break the 10,000 northern army led by Wu Yi and could not open up the back road, then as time passed, the back road of the Wei army was cut off, the food and grass were insufficient, and finally they could only retreat.

This is Zhang Xi's overall defense strategy for Guanzhong.

Zhuge Liang has no doubts about Zhang Xi's defense ideas, and in terms of emergency response, Zhuge Liang does not think that Zhang Xi will be worse than Cao Zhen, Wang Chang and others on Cao Wei's side.

Just a little, Zhuge Liang is worried about a little.

"If the Wei thief takes more than 1,000 soldiers as a team and leaves Tongguan in separate ways, what can the Yuan Chang do?!"

This question was asked, and Zhang Xi didn't know what Zhuge Liang was going to do.

"If the Wei thief only has a team of 1,000 people and dares to divide the troops, he only needs to teach Zuo Fengyi's counties to stick to the spot, and Xi will send the northern army back and forth to respond to such a method of warfare, how can it threaten Zuo Fengyi's core and even Chang'an?!" Zhang Xi asked puzzled.

A team of 1,000 people, even if the soldiers are divided into ten routes, the total strength is only 10,000 people.

Moreover, the size of the thousand-man team, with the configuration of Zuo Fengyi's 500 county soldiers per county, and the defenders of the city, as long as the county order does not take the initiative to surrender, there is absolutely no possibility of breaking through in the short term.

In addition, let Wu Yi lead the northern army back and forth to respond, maybe the Wei army can only harass and withdraw the troops, and even the county town can't be captured, what's the point of sending troops like this? !

Zhuge Liang shook his head and said, "What if the purpose of the Wei thieves is not to attack the city, but to harass them?!" The Yuan Chang should not forget that Guanzhong is insufficient, and if the cultivated land is barren again, I don't know when it will be able to return to its former prosperity. ”

Well. And that's really it. A bad move.

The land of the four states of the Han Dynasty, but in fact, Yizhou wants to supply Nanzhong, Jingzhou is incomplete, lacking two counties, and has to supply the grain, grass and ordnance needed for the Northern Expedition, Liangzhou is a place that urgently needs to invest money and grain to stabilize. If Yongzhou can't resume production in time, then the impact on Dahan will be visible to the naked eye.

And the essence of Yongzhou is Sanfu, which is the Guanzhong Plain.

Starting from Feng Yi on the left, through Chang'an and Fufeng on the right, it is not only a very early agricultural area, but also surrounded by three irrigation belts of Jing River, Wei River and Luoshui, as well as various water conservancy facilities that have been built since the Spring and Autumn Period.

If Guanzhong cannot resume production in time, then even if the Han occupies Guanzhong, it will lose its original meaning.

And Zhuge Liang's biggest concern is that Cao Wei plans to attack and harass the Guanzhong area with a small force.

Especially in the Zuo Fengyi area.

Zuo Feng Yi is different from the right Fufeng, there is no mountain road here to restrict the Wei thieves from entering and exiting, ten miles outside Tongguan, it is a vast plain, there is not enough army, you can't lock Tongguan at all.

Even, if Cao Wei really used this method of interspersing and harassing small forces to harass Zuo Fengyi's area, you would have arranged a large group of men and horses to guard the Tongguan road, and people would be able to easily bypass it.

In these days, the blockade is not so easy to manage.

After all, the military reconnaissance in these years only relies on a pair of human eyes, and the communication efficiency can only be supported by the horse's legs, and when you find that the Wei army is interspersed with Zuo Fengyi and sends troops to the rescue, the city will not have any losses, but the fields outside the city, as well as the crops in the fields, will not be saved.

If Cao Wei really wants to use this disgusting trick to deal with Guanzhong, Zhang Xi really has no good way to deal with it.

If the enemy army really only comes for grain and grass crops, no matter how hard you defend it, you will not be able to completely defend it. When to send troops and which grain fields to burn, it is completely up to the people to decide, if you are in a good mood today, you will not send troops, and tomorrow when you are in a bad mood, a small number of soldiers and horses will drive straight in, and at the cost of losing hundreds of people, kill Changling County next to your Chang'an City, and burn your tuntian crops, it is not impossible.

No matter how you defend it, the initiative is always in Cao Wei's hands, and you can only passively respond to the battle.

If the troops are not enough, they must take care of the city defense and prevent the enemy from burning down the fertile land. What can you do?!

You can't learn from the one on the other side of the ocean in the future, and build a wall outside Tongguan.

People are a big business, and they can afford to toss, and in this era, the productivity of the Han Dynasty and the material and financial resources of the Han Dynasty can't do this at all.

Zhang Xi suddenly had a headache when he thought of the possibility that Cao Wei might fight a guerrilla attack and disturb war with you.

In the final analysis, it's because Guanzhong is now under-armed. If there are really 100,000 people who can be mobilized, he, Cao Wei'an, dares to use such a disgusting method?!

How many people have buried you.

It's a pity that it is useless to complain now, so I can only hurry up and think of ways to deal with it in advance.

But Zhang Xi thought about it and found that there was really no good way.

There were no too dangerous passes in the Zuo Fengyi area, and there were not enough troops to block the enemy, so he could only adjust his original operational ideas.

According to Zhang Xi's calculations, if Cao Wei had adopted this kind of guerrilla warfare, the base camp would definitely be in Tongguan, and with the characteristics of guerrilla warfare in this era, it is unlikely that the focus of Cao Wei's attack would be too far from Tongguan.

In fact, the concept of guerrilla warfare existed very early in Chinese history, but there was still an essential difference between guerrilla warfare in this era and later guerrilla warfare.

Therefore, the scope of attack in guerrilla warfare in this era is limited, and unless Cao Wei has another amazing and brilliant Huo Quai, guerrilla warfare is destined to be too far from the logistics base.

Zhang Xi carefully sorted out the combat methods of the soldiers in this era, and found that even if Cao Wei sent a small force to guerrilla, the combat time would not exceed five days.

One day of departure and one day of return, three days of fighting in between, were used to destroy the crops in the countryside outside the city.

The time can't be longer, if it is longer, it will be blocked by the Han army that received the news and came back, and at that time, it will be a dead word.

And with the marching speed of the army in this era, the distance of a day's march is about forty to fifty miles. The buffer zone set aside by Zhang Xi twenty miles away from Tongguan is obviously insufficient.

However, if he retreated another 30 miles, the reconstruction of the buffer zone would allow thousands of hectares of fertile land to be carved out, and Zhang Xi could not afford this loss.

Because of the differentiation and compromise policy between the imperial court and Jingzhou and the Yizhou family, the area of Tuntian in Guanzhong has been reduced by 5,000 hectares.

Fifty miles of buffer zone, plus areas that could be caught in the crossfire. In the entire Zuo Fengyi, a quarter of the territory can no longer be used as a stable tuntian area.

And if Cao Wei is allowed to take the opportunity to take root in the Zuo Fengyi area, continue to push this harassment strategy westward. Zhang Xi can't keep retreating like this, right?!

Zhang Xi had no choice but to give up the method of expanding the buffer zone.

It is necessary to encircle these Cao Wei's armies in the front.

And as soon as he thought of this, Zhang Xi could only choose to follow Guan Yu's example.

When Guan Yu was in Nanjun, how did he push the front in the direction of Xiangyang little by little under the pressure of Xiangyang Cao's army? !

In fact, to put it bluntly, it is not difficult, that is, the entire northern part of Gangneung is regarded as a war zone, and the grain harvest in this place is not extravagant at all, and it is constantly taking the initiative to launch an offensive, fighting a war of attrition regardless of success or failure, consuming four or five years, and advancing northward little by little.

But if you do this, your own consumption is not small, so when the battle of Xiangfan was fought, Guan Yu almost went out if it wasn't for Zhang Xi leaving a Wang Ji in Jiangling, it is estimated that the ending would not be much different from history.

And today's Yongzhou is still different from the situation in Nanjun at the beginning.

Although Nanjun is only the size of a county, there is no shortage of Dingkou, and now that Dingkou in Yongzhou has been halved, Zhang Xi almost emptied Zuo Fengyi in order to ensure the development of Youfufeng and Chang'an areas, and used it to engage in Tuntian.

What was lost this time was not half of Nanjun's grain income, but probably the entire Zuo Fengyi County.

What's more, the Cao army on the Wuguan Road side will not just watch the development of the Youfufeng area with peace of mind, if this kind of harassment is replicated in the Youfufeng, then with the number of Wubao on the right Fufeng now, it may not be able to completely prevent the small force of the Cao army from infiltrating the guerrillas.

After thinking about it, Zhang Xi still didn't have any good awards, so he had to curse in his heart - what kind of immoral idea did the ghost who lacked virtue come up with?!

I'm not afraid of damaging yin virtue by doing this, and all the children and grandchildren of future generations will be idiots?!

(End of chapter)