After mid-September, the weather starts to get cooler.

At this time, Xihe County gradually regained its former stability and began to become orderly.

The common people are the most able to bear hardships. Although they have gone through many hardships and lived countless difficult lives, as long as they are given a stable environment, they can rekindle their hope and start over again and again.

Xihe County originally had more than 20,000 people, and Tian Feng had 60,000 people, and Cao Ang wanted to bring another 20,000 people to enrich the population of Xihe. These people are the foundation for the future development of Xihe.

Cao Ang is planning to implement a "military-civilian integration" system in Xihe County, with both combat power and food available. At least these people should be able to protect themselves when the Han Dynasty cannot take care of them.

Cao Ang has thought about many ways. Whether it is the palace army system of the Sui and Tang Dynasty or the guard system of the Ming Dynasty, it is definitely unrealistic. Now Cao Ang cannot make a big move and has to tinker with the original system.

So Cao Ang started to improve the local "Wushili" system, organized the people, carried out farming, and trained troops, but he was very busy every day.

However, Cao Angle is among them. If a more mature system is established in Xihe County, it can be promoted in local border counties, and in the future, the border counties can be made more stable.

Cao Ang was writing something that day, and Guo Jia came to Cao Ang's study excitedly.

When Cao Ang saw it was Guo Jia, he put down his pen and said with a smile: "Fengxiao, when did you become so popular in your work?"

However, Guo Jia did not reply to Cao Ang's teasing, but said excitedly: "Ming Gong, the good news has just been sent by Yang Sima of Wuyuan County, Jiuyuan City has been defeated, and Helian is dead!"

Cao Ang was a little stunned and asked quickly: "Is it the Lord Helian of Xianbei?"

"Exactly!"

After hearing this, Cao Ang rubbed his hands excitedly and was so happy that he didn't know what to say for a moment!

"Yang Yi's merits are in the present generation and will benefit the future generations!"

Cao Ang has never been so out of control as he is now. This incident really made him so excited.

Historically, after Dou Xian, Geng Bing's Northern Expedition and Ren Shang, and Wang Fu chased and killed the northern Xiongnu Chanyu, the rule of the entire northern Xiongnu basically collapsed. Xianbei took advantage of the situation to occupy the Mongolian grasslands, annexed more than 100,000 remaining Xiongnu tribes, and began to grow strong. It was not until a year later that the unprecedented Xianbei leader Tan Shihuai unified all Xianbei tribes and established the huge Xianbei Empire. He ravaged the Han Dynasty for more than 20 years and even completely defeated the main force of the Han army in the Xiping Northern Expedition.

After Tan Shihuai's death, his son He Lian came to the throne.

But because He Lian was young, and Tan Shihuai divided the entire Xianbei into three, Xianbei began to split. Although He Lian was still powerful, he could only be regarded as the nominal co-leader of Xianbei.

But now that He Lian is dead and He Lian's disciples are still young, the entire Xianbei has completely lost its co-owner and can only end up being divided.

Unless there is another Tanshihuai in Xianbei, Cao Ang is not worried. At least in the entire history, there is no such person. Therefore, Helian's death means that the huge Xianbei Empire is completely divided. In the short term, it will no longer be able to do anything. This is a disaster for the entire Han Dynasty.

Historically, Cao Cao was lucky. Xianbei was divided for thirty years, so there were no major problems in the north. By the time Kebi was able to unify Xianbei in the central part of the country, the Central Plains had been completely stabilized, and Xianbei had completely lost the opportunity to take over the Central Plains.

So Cao Ang cannot be overly excited.

Cao Ang calmed down after a while, looked at Guo Jia and said, "Fengxiao, tell me, how did Yang Zicai kill Helian?"

"promise!"

After Yang Yi and his party crossed the Yellow River to the west, they immediately headed north to Wuyuan.

The Xixihe area was originally the residence of the Huns, but after the Southern Xiongnu fled to the Dongxihe area, it was occupied by the Eastern Qiang.

However, in the past two years of the Qiang-Han war, the Qiang people suffered heavy losses, and more Eastern Qiang tribes were willing to go nomadic in the warmer Shangjun, Beidi, Anding and other places, which made the Xixihe area gradually desolate.

Everyone arrived at Meiji all the way. Except for some scattered Qiang and Hu tribes, there were no large tribes along the way. This made Yang Yi very happy. The environment in Meiji was just suitable for the southern Xiongnu to withdraw.

The army continued to move northwest and soon reached Huze (now southeast of Dalat Banner, Inner Mongolia).

At this time, Yang Yi did not dare to go north rashly.

Although Yang Yi defeated the Qiang and Hu twice, the Qiang and Hu were still very different from the northern Hu. Yang Yi did not have enough troops, so he became more cautious and fought steadily.

On July 26, Yang Yi ordered Hu Wu to lead more than a thousand people across the Yellow River and attack Siyang City (now the ancient city of Wan Township in the southeast of Baotou City, Inner Mongolia).

Siyang City is located between Yinshan Mountain and the Yellow River. The land here is backed by mountains and water, and the terrain is the narrowest. Occupying this place can block the connection between Yunzhong and Wuyuan. If the Xianbei people want to go west, they will have to detour to the north of Yinshan Mountain.

Hu Wu's troops were all cavalry and moved swiftly.

However, Hu Wu did not expect that shortly after his troops crossed the river, they encountered a Xianbei cavalry force. There were about 2,000 people on the other side, and their identities were unknown.

This was something unplanned, but at this time, both sides had to fight.

So Hu Wu attacked the opponent first, and the Xianbei people on the opposite side also took the initiative to fight and fought with the Han army.

Both sides were cavalry, with horses hooves intertwined and swords facing each other. You came and I fought, and it was hard to separate. Although the number of the opponent was far greater than that of the Han army, Hu Wu relied on his equipment to fight the enemy to a draw.

The two sides fought fiercely for half a day, with no winner or loser.

The Xianbei people were the first to retreat. For them, this kind of attrition war was not worth the gain, so they retreated voluntarily. When Hu Wu saw that the Xianbei people had withdrawn, he did not take the initiative to pursue them.

In order to prevent the Xianbei people from returning, Hu Wu ordered a retreat to the south of the Yellow River.

At this time, Hu Wu hesitated as to whether to continue rushing to Siyang City. The raid had been exposed. Siyang City was a fortress in the north. With more than a thousand men, he would definitely not be able to break through the fortress.

Going north at this time, the greatest possibility is to return without success, and may also encounter a flanking attack by the Xianbei people.

For the Han army, retreat seemed to be the best option.

However, retreating at this point would fail the Han army's plan and expose the Han army's reinforcements, which put Hu Wu in a difficult position.

Whether to advance or retreat is a very difficult matter.

At this time, the scout reported that the Xianbei people were heading towards Yunzhong and did not go westward.

Hu Wu was surprised and happy. The other party did not rush to Siyang City, which created infinite possibilities for his surprise attack. What if Siyang City didn't get the news?

So Hu Wu immediately ordered the entire army to march westward along the Yellow River.

The army galloped all the way, and in the evening, they finally arrived at the east of Xianyang City. In the lonely city along the long river, under the afterglow of the setting sun, the entire Xiyang City shone brightly under the rays of the sun.

As an important link between the east and the west, Siyang City is in a peaceful state, with the city gates wide open. The war in the west is less than a hundred miles away, and it seems to be two different worlds.

The sunlight shone on Hu Wu's face, which was particularly dazzling. He looked at Siyang City to the west, but his heart was extremely excited.

The city was waiting for him, undisturbed by the previous battle.
Chapter completed!