After receiving the news of Guan Yi's invasion, Sima Wang quickly changed his strategy: Chang'an's side could provide 100,000 stone of grain and 300,000 stone hay to the bald department to help the bald department survive this winter. The baldness department is also allowed to temporarily stay in Pupyeong County this winter. He Sima Wang can also privately give some burning knives to the high-level officials of the baldness department. But in return, the bald department had to provide 5,000 cavalry and 10,000 war horses to the Chang'an army.

As the leader of such a large tribe, the bald tree function certainly has the potential to be a hero. From Sima Wang's sudden softening of attitude, he keenly discovered the problem.

"The Jin people suddenly softened, and there is no doubt that the Han kingdom further south began the northern expedition again."

"So what do we do with tree function? Send men to find the Han people further south? ”

"No, and everything. We are now far away from the Han people and close to the Jin people. There is less and less hay in the tribe, and the support of the Jin people is needed for the time being. Therefore, we still have to agree to this Sima Wang's condition and send cavalry. ”

"I see. Our soldiers are going to come out, but who we will fight in the end depends on how the situation on the battlefield is to judge, right? ”

"Hahaha, and Almighty, you're really the wise man of our bald department, that's what I thought. So can you lead these 5,000 people? ”

"Good! Please leave it to me. I also wanted to see what the Han people in the south were like. ”

"Okay, let's stop here for the time being, and after the Jin people's food is delivered, we still have to send troops. lest the Jin people always say that we don't believe in our words. ”

"Hehehe, tree function, how can you also learn those Jin people to drop their book bags?"

……

After Sima Wang dealt with the bald department here, he urgently sent a messenger to the Fuyi Protector Army Department to visit Li Mu, the leader of the Di people.

"Generally speaking, the general of Zhengxi hoped that the Eastern Qiang Hunter would send no less than 10,000 troops to the west to Beidi County. Help me Dajin monitor the baldness department. ”

"Please send the envoy back to the general of the west, and Li Mu will receive the order!"

"Good! Please don't worry about General Li, General Zhengxi is the most particular about his work. Therefore, General Li will not be allowed to run this trip in vain. 100,000 stone of grain, 300,000 stone of hay. Help the nobles survive this winter. ”

"Hey, we have received too much favor from the Sima family! It's really embarrassing, please tell the general of Zhengxi that the people of Di will not let the Xianbei barbarians go south half a step! ”

Among the Xiongnu, Xianbei, Di, and Qiang, four foreign races that are close to the Central Plains and have a strong tendency to migrate inward due to the pressure of survival (the Xiongnu are still vassals of the Xiongnu, and the population of this ethnic group is too small). The Di people have the highest degree of sinicization, and are relatively the least aggressive, and are the most accepted by the Han people among the four different races. Therefore, after Sima Wang was about to leave a group of strong people in the bald department, he immediately asked the Di people to help contain the Xianbei people - Zichu Gong was more than sixty years old, and he would not be naïve to think that just that little grain and grass could completely appease the bald department.

On the fifth day of October, Guan Yi entered the Guanzhong Plain. Then, with thunderous speed, on the sixth day of October, he took Yixian, which was not heavily defended.

On the eighth day of the first month, Sima Wang got the news and quickly reached an agreement with the Baldness Department. On the 11th, Sima Wang led his army back to Chang'an and immediately began to make preparations for battle. Since the 30,000 troops he led at the beginning were originally in a state of armed readiness, this process was completed quickly. On the 13th, after all the soldiers, horses, grain and grass were ready, Sima Wang led a concentrated army of 50,000 from Chang'an and went west to Wuzhangyuan, where Yixian County was located. On the 16th, Sima Wang's whole army arrived in Yixian.

At this time, it had been ten full days since Guan Yi took Yixian.

What did Guan Yi do in these ten days? Three things: strengthen the city defense of Yixian County, build a new castle on the south bank of Weishui opposite Yixian, and send Huangfu Min to hook up with the Guanzhong clan.

The distance between Yixian and Chang'an is about 120 kilometers (straight-line distance), because both places are on the Guanzhong Plain, so the actual distance between the two places is not much different from the straight-line distance. In short, once the cavalry is running, it can complete a direct reach in one day. Guan Yi's legion was stuck here, which meant that a knife tip was pressed against Chang'an's throat, and Sima Wang's Guanzhong legion was forced to concentrate and garrison between Yixian and Chang'an, completely unable to move.

In Guan Yi and Jiang Wei's plan before sending troops, Guan Yi's road was likely to be blocked at the exit of the valley for a long time. In this way, although Sima Wang's side will also be pinned down by Guan Yi, he should also be able to send some reinforcements to support Hu Fen in Longxi. Therefore, Jiang Wei's psychological expectation is to deal with Hu Fen's 70,000 or 80,000 with 80,000 people. (Hu Fen's Longxi Army had only 50,000 men).

Then Jiang Wei and Hu Fen were circling in Longxi, while Guan Yi's side had to break the defense of the valley as quickly as possible and go out to Yixian. After taking Yixian, the troops sent out by Sima Wang to support Hu Fen must return to defense as soon as possible, and the Jin troops exposed to the field at that time will naturally be taught by Jiang Wei what is the military strategy of the strongest field commander in this era.

As a result, God blessed the Great Sima, and when he appeared at the exit of the Slope Valley, Zichu was in the Northland County to pacify the bald department. The valley was not defended at all. So Guan Yi made a decision, and the whole army immediately went out to Yixian.

The defenders of Yixian County were less than five hundred, and seeing such a large army as Guan Yi, of course they left without a fight. Guan Yi successfully achieved the goal that was expected to be achieved in the middle of the war at the beginning of the war.

After taking Yixian, Guan Yi immediately ordered Xian Hong and Zhao Yi to each lead 5,000 cavalry out. All the way to the east, the cavalry guard curtain was opened. All the way to the south, under the leadership of Huang Fu Min, contact or deter those powerful families who have settled at the junction of the northern foot of the Qinling Mountains and the Guanzhong Plain - this is the future grain and grass supply channel of the Guan Yi detachment of the Shu Han Army, and there must be no mistakes - Lao Tzu greeted first, and in the next war, it is best for you to support us, and it is completely acceptable to remain neutral. If anyone dares to sneak attack Lao Tzu's grain road, our cavalry will come to your house immediately to ensure that no chickens and dogs will be left!

After scattering the cavalry, Guan Yi ordered the crossbowmen and mandarin duck soldiers not to unload their armor to strengthen their combat preparations. The remaining 20,000 troops, together with the first batch of 5,000 people, were divided into two parts: one-third was reinforced with cement and raised the city wall of Yixian. Two-thirds of them went to the south bank of Weishui, facing the county seat of Yixian County, to build a small city with a radius of only ten miles.

With the development of the climate of the Xiaoice River, the bamboo forests that could be seen everywhere on the Guanzhong Plain in the early years of the Western Han Dynasty have completely disappeared by now. So the bamboo and cement walls are completely ignored, but the current Guan Da Sima is no longer the poor three in Fuling County before. Da Sima, who has a lot of money and food in his hand, directly went to the wire to make the bones this time, and covered it with an inferior version of the reinforced concrete wall of cement.

Speaking of which, China's rammed earth architecture has long been at its extreme in this era. Its architectural strength is also no worse than those of modern society. The most intuitive example is: the straight road of the Qin Dynasty, from the third century BC to the 21st century AD, more than 2,000 years of wind and rain, the straight road will never grow grass!

However, the biggest disadvantage of rammed earth construction compared with cement construction is that it takes too long and consumes too much manpower. Under the circumstance that Sima Wang was not a mediocre general and his reaction speed was absolutely fast enough, if there was no cement, Guan Yi would not dare to be so crazy, and directly drove all the troops into the hinterland of the Guanzhong Plain without achieving a field victory.

In 234 AD, Zhuge Liang, the prime minister of Shu Han, launched the Fifth Northern Expedition with desperate ideas. After leaving the valley and entering Wuzhangyuan, in the face of Sima Yi's army, he didn't dare to advance desperately anymore - if he didn't annihilate the opponent's field corps, he would continue to march forward, and the grain road or something would be exposed to the opponent's attack range.

And what about Guan Yi's Northern Expedition this time? With the blessing of the sky, he actually let him enter the Guanzhong Plain so smoothly. Although the troops in his hands now are less than half of Zhuge Liang's back then, Sima Wang's hands do not have Sima Yi's 200,000 troops back then. Therefore, Guan Yi, who is extremely bold, is ready to play a big game this time.

Take Yi County on the north bank of Weishui, and then build a new city on the opposite bank of Yi County. The two cities are connected by a zipline. After that, the follow-up grain and grass transferred from the valley directly entered the new city to supply the whole army. Weishui will no longer cause trouble to the advance and retreat of the Shu Han army and the grain route. This is one of them.

The 40,000 Shu Han army was nailed to Yixian, Sima Wang's whole army was not allowed to advance westward, and Jiang Wei's corps formed a troop advantage over Hu Fen's corps - since General Jiang's debut, there has never been a general Cao Wei who has defeated Jiang Wei in a situation where his troops are at a disadvantage. The title of the contemporary No. 1 field commander is not covered. As long as Guan Yi is here, Liangzhou is almost at your fingertips. This is the second one.

After all, the Jin Empire was the largest country in the world, and sooner or later it would send a large number of reinforcements into Guanzhong. Then enter Longxi from Guanzhong. The so-called army has not moved, and the grain and grass have moved first. The larger the army, the higher the dependence on logistics. According to the general situation, in the past, Cao Wei put troops and materials into Longxi, generally starting from Chang'an, and then the materials were on the ship, and along the Weishui west to Chencang (Weishui above Chencang, surging from the high-altitude area of Longshan, the water potential is more urgent, not conducive to shipping), and then turn off the ship to the north to Qinchuan, walk the street pavilion, and enter Longxi.

Now, Guan Yi is stuck on the Weishui. In ancient times when there were no highways, abandoning the waterway and going by land required much more cost and time!

Guan Yi personally sat at the key node of Yixian, and everything was to buy time for Jiang Wei to win the five counties of Longxi as much as possible!