After disengaging from the Han army, Sima Wangjun retreated more than 20 miles east before stopping and began to gather his troops.

This battle was really quite aggrieved for the commanders up and down the Guanzhong Corps of the Jin Kingdom.

It doesn't make sense, the enemy is just a spear, and the toss and turns is stabbing and stabbing. In this way, the elite infantry of his side was beaten back again and again.

As for the cavalry, not to mention, for decades, in the field battles between the Han and Wei dynasties, the cavalry on the Wei and Jin sides has always had the advantage. When did the cavalry of the Shu thieves become so powerful?

"Your Majesty, the Admiral can see it very clearly. The cavalry of the Shu thieves was equipped with two unilateral stirrups under the saddle, so that the cavalry's feet were supported. In this way, all the energy that was previously used to keep the balance of the body can be used to kill the enemy! ”

"Not only that, my lord. With this stuff, the rider can do more than 10 times more on the horse! Therefore, in this battle, our army was unjustly defeated! ”

After listening carefully to the description of the stirrup by the two horsemen, Sima Wang sighed: "Hey, the old man remembers that the unilateral stirrup was there in the former Han Dynasty, right?" ”

"Back to the king's words, it is true. In the past, Emperor Wu of the Han Dynasty's 100,000 iron horsemen all had unilateral stirrups. ”

"Hey! Why didn't we think of it? The role of a unilateral stirrup is mainly to help the rider get on and off the horse. If that's all the case, why didn't we think of putting stirrups on both sides of the horse's back, so that the rider could have a support point while on the horse! ”

"Yes, my lord. Subordinates are ashamed. ”

"I don't blame you, I don't blame you. For hundreds of years, no one thought about it. Hey, this Guan Zifeng is really a genius. ”

After a long sigh, Sima Wang suddenly became in a better mood again, and he raised his head and laughed.

"Uh, why is the king laughing?"

"Hahaha, I laugh at Guan Zifeng after all, he is still too young. If you have a baby, you are in a hurry to take it out and show it. Well, that's right, this battle was lost by our army, but our army only spent a few thousand people to figure out the meaning of the stirrup. Ah, after this kind of thing is there, the combat power of the cavalry will definitely increase significantly. But compared with the huge difference in national strength between Xishu and my Great Jin, after everyone's cavalry is equipped with stirrups, who will benefit more? ”

"I see, the king Takami!"

"Yes, the king is far-sighted, Guan Yi Xiao'er will definitely die at the hands of our stirrup cavalry in the future!"

"Hehehe~~~" After raising his hand to stop the tide of sycophants of the group of people below, Sima Wang raised his head and said to Xun Kai: "Mao Bo was in the formation just now, did you see the mystery of the Shu thief gun formation?" ”

"Uniformity, orders and prohibitions, it is really elite!"

"Is there a way to break the formation?"

"Hmm......" Xun Kai lowered his head and pondered for a while, and then looked up helplessly: "I haven't thought of a way to crack it for the time being." The King forgives his sins. ”

"Hey, the old man actually thought about the wonder of this gun array all the way back, but he thought about it and felt that it was extremely simple. But if it's really that simple, then I can't think of a way to crack it, but I don't want to. These things can be left to those people in Luoyang to think about. ”

"So what does the king mean?"

"Relying on the strength of our army alone, we can't face Guan Zifeng on our own now. And the Shu thief entered the prison this time, it is impossible to have only such a few people. So according to my guess, Jiang Boyue's Shu thief must have gone to Longxi. But Guan Zifeng is nailed here again, and our army will not be able to go west to Longxi to support in a short period of time, so Hu Xuanwei can only let him ask for more blessings. ”

"What does the king mean that our army will return to Chang'an to defend and then ask Luoyang for help?"

"However, this time the Shu thief will enter the court, and its scale must be greater than before. So it's not something that our Yongliang Army can deal with alone. The whole country must be rallied to fight it back. Uncle Mao, I'll work hard for you later, I'm going to write a long letter to Your Majesty, and then you will personally bring someone to Luoyang! It must be sent to His Majesty's desk as soon as possible, and His Majesty must send reinforcements immediately, immediately! ”

"No! Please rest assured, your subordinates will definitely lead the reinforcements back as soon as possible! ”

……

Guan Yi set out from Hanzhong on September 25 and entered the Guanzhong Plain on the fifth day of October. And what about Jiang Wei's side? Due to the Qishan battalion in hand, the defense line of Yinping and Wudu in Shu Han obviously moved a lot north. Therefore, the general swore an oath from Qishan on the first day of October, and took Xixian County at the foot of Qishan on the third day of October. Then Jiang Wei and Zhang Yi's two armies, totaling 80,000 people, flocked to Shangqi together.

Since the Qishan camp was taken by Jiang Wei more than four years ago, Xixian at the foot of Qishan has been given up by Hu Fen strategy. The people of the county town have long been moved away by Hu Fen, and the garrison usually has only one or two hundred people: they don't want to defend the city, they just want to spread the news. Therefore, the loss of West County is not a big deal.

But Shangtai is different, the west of Shangtai is the county of Tianshui County, and the east is the county of Guangwei County, Linwei. The so-called Linwei is, of course, a city built along the Weishui. If this place is lost, the Weishui channel will be completely blocked.

Of course, the amount of Weishui in the west of Longshan is small and the drop is large. Originally, it was also not conducive to shipping. But more importantly, as soon as Linwei was lost, Guangwei County no longer had a strong city defense, and north of Linwei, the Jin army no longer had a heavy army group to defend. And the street pavilion is one hundred and sixty miles north of Linwei!

Therefore, we must keep it! If you don't lose it, it is very difficult for Jiang Weijun to advance and retreat. After Shangqi is broken, Hu Fenjun will be passive everywhere.

Hu Fen's Longxi Army had a total of 50,000 troops. Hu Fen put a whole 10,000 people in Shangtai City. The general stationed here is the remnant of Deng Ai's Duan Zhuo.

Duan Zhuo, the word is restless. A native of Dunhuang, Liangzhou. Deng Ai's subordinate generals. He was seriously injured in the Battle of Mianzhu and was evacuated to Longxi to recuperate, and he escaped. As a veteran under Deng Ai, there are quite a lot of Deng Ai's old troops in the army he leads. These people, of course, hate Jiang Wei very much. Therefore, when he heard the news that Jiang Wei had entered the Kou again, there was no need for any mobilization, and his morale naturally exploded to the extreme.

However, as a veteran general who had fought with Jiang Wei for a long time, Duan Zhuo knew very well that with 10,000 people in his hands, it was possible to defend the city. But if you want to go out of the city and fight Jiang Wei in the field, you can't. Therefore, on the one hand, he comforted his own soldiers and explained to them the necessity of defending the city, and on the other hand, he sent an envoy to warn Hu Fen stationed in Ji County.

On the fifth day of October, Jiang Weijun arrived at the foot of Shangqi City. After failing to persuade him to surrender, he tried to attack the city once, but was unsuccessful.

However, Jiang Wei is not in a hurry about this.

"Hehehe, this Northern Expedition, Zifeng helped, I don't have to worry about the Jin army from Guanzhong in a short time. So, Bo Gong, don't worry, we can rest for a few days under the city. ”

"Hehehe, Boyo, you want to use Shangqi as bait to attract Hu Fen's main force to come. Take this opportunity to succeed in the fight, right? ”

"Well, if only that were the case. Hu Fen is not a nerd like Wang Jing, how could he not understand the ingenuity here. If I were Hu Fen, then I would be able to find a way to inform Duan Zhuo Cage City in the city to defend it. On the other hand, he sent an envoy to ask for help from Guanzhong. ”

"Hey, what's that going to do? Boyo, although Guan Zifeng will definitely be able to nail Sima Wang to Chang'an, but the Chinese army of the Jin State in Luoyang is not easy to dismiss. I also have to take the street pavilion in advance and improve the city defense, if Shangtai can't take it for a long time, and Hu Fen doesn't lead the army to the decisive battle, then we ......."

"Hahahaha~~~ Bo Gong, we have gone on so many Northern Expeditions, and Shangqi has been here several times. Tell me, why couldn't we take it before? ”

"Needless to say. In the past, we didn't have the Qishan camp in hand, so we could only start from the lower debate or the middle of the road. This soldier's rations have always been very tight, and they are not durable at all. So we can't besiege a fortified city for a long time or something. ”

"Yes, now we've solved this problem."

"It is not enough to solve this problem alone, this Shangtai City is built on the bank of the Jing River, and the water in the well in the city is endless. There will be no shortage of water like other counties in Longxi. Even if they are besieged for a long time, as long as there is enough food in the city, they can hold out for a long time. We can't afford to spend that time. ”

"Hehehe, Bogong, this time, Wei is ready to make a fuss on this Jinghe."

"Oh? Dare to ask the general, will the plan be released? ”

"Bogong, come and see, Shangtai is located on the north bank of the Jinghe River, but the terrain here is high in the south and low in the north, while Shangtai is in a river bay. Such a terrain does make the wells in Shangtai City not have the risk of water shortage. But if I build a dam in the upper reaches of Shangtai to intercept the water of the Jinghe River, and then release the dam after it has accumulated to a certain extent......"

"Oops! General, what a clever plan! ”

"Hey, in fact, I thought about how to break the city more than twenty years ago. Unfortunately, at that time, there were not enough troops, food, grass, and people. It is simply impossible to carry out such a large, labor-intensive project. ”

Raised his head and breathed a long sigh of relief: "God bless the big man, descend Zifeng." Under his rule, the country has become much stronger than it was when the prime minister was in power. This time, we have an unprecedented army of 80,000, inexhaustible food, and tens of thousands of people accompanying the army. With so many resources to support me, I can finally put all the ideas I've been thinking for years into practice! ”

"Good! General, Zhang Yi will definitely do his best to help the general succeed! ”