The reason is very simple, on this grassland, the trend of strength and weakness has long been reversed.

Su Zhe's army of 200,000 had nearly 100,000 cavalry alone, and the number of cavalry in Xianbei had dropped to more than 80,000 after several defeats.

The number of cavalry is less than that of the Wei army, and on this grassland, in addition to being quite familiar with the terrain, the Xianbei people have lost the upper hand.

Therefore, when Tuoba Liwei sent light cavalry to wantonly plunder the Wei army's flank and rear line, Su Zhe immediately went-for-tat and also sent the same number of cavalry to protect the grain road and ride against the Xianbei people.

After several encounters, the Xianbei people lost thousands of cavalry, but destroyed less than 10,000 grains and grass of the Wei army, and the pay was seriously disproportionate to the benefit, so they could only choose to give up.

After that, Tuoba Li retreated in Eagle City, and no longer dared to divide his troops and horses to attack Su Zhe's supply line.

The threat of grain and grass was solved, and Su Zhe no longer had any worries about his life, and ordered Hao Zhao in the rear to send countless grains and grass to the front line in a steady stream.

At the same time, a lot of timber was also sent into the camp, and Su Zhe asked Ma Jun to take hundreds of craftsmen to build the Divine Thunder Cannon day and night, just waiting for the siege weapon to be built, and immediately launch an attack on the enemy in Eagle City.

And Tuoba Li, whose strength has been greatly damaged, can only urge Dragon City in the Mobei Grassland to send more soldiers and horses to Eagle City to enhance his strength.

Tuoba Liwei was reluctant to retreat, determined to defend Eagle City,

If you retreat further, you can only abandon the Yinshan defense line, and let the iron cavalry of the Wei army calmly enter the Mobei grassland and burn and rob them.

Although the Mobei grassland is vast, it is also barren, except for grazing, the Xianbei people have no industry, and there is no way to loot the wealth of grain and grass from the border states of Wei, as well as the population, to increase the strength of the Xianbei people.

Once driven back to Mobei by the Wei army, it means that the decline of Xianbei is already a matter of time.

Eagle City, inside a dimly lit military tent.

"Second brother, when the battle comes to this, I'm just afraid that the Xianbei people won't last long." It was Sima Yi's brother Sima Fu who spoke, and his tone was worried.

Sima Yi took a sip of wine and snorted coldly: "Tuoba Li is slightly arrogant, he didn't listen to my advice, he underestimated the Su thief, and he is also to blame for falling to this point today, and it will be difficult for him to achieve great things after all." ”

"So what are we going to do?" Sima Fu looked uneasy.

Sima Yi pondered for a moment, and his eyes pointed to the east: "If Tuoba Liwei is defeated, our Sima family will not be able to gain a foothold in the grassland, so we can only go east to Goguryeo and defect to the Gao clan. ”

"However, with the ambition of the Su thief, he will even destroy the Xianbei people, and I am afraid that he will not let go of Goguryeo, and if his army comes to attack at that time, Goguryeo may not be an opponent."

Sima Yi sighed helplessly: "At this point, you can only take one step at a time." ”

Sima Fu's heart was shocked, and he sighed helplessly.

……

South of Eagle City, Wei Ying.

The counterattack of the Wei army began.

After making sure that there were enough cavalry to protect the grain route, Su Zhe began to divide his light cavalry, bypassed Eagle City, and launched a raid and revenge against the Xianbei people.

For many years, only the Hu people of the grassland went south to graze horses, and now, the offensive and defensive trend has been reversed, and it is finally their turn to enjoy the pain of being burned and looted.

More than 30,000 Wei troops, under the guidance of their guides, rushed to the pastures of the Xianbei people in the Monan grassland, burned down their tents, robbed their cattle and sheep, killed their men, and then plundered their women.

On the grassland north of Eagle City, the smoke was everywhere for a while, and it became the Shura Hell of the Xianbei people.

In less than a month, nearly half of the Xianbei men were killed, and more than 20,000 Xianbei women were looted back to serve as slaves for Su Zhe to reward meritorious soldiers.

In addition, nearly 100,000 cattle and sheep were looted by the Wei army, which served as a resource for the Wei army to feed the war with war.

Tuoba Liwei did not have enough troops to protect all the Xianbei tribes from being sacked by the Wei army, so he could only send a limited number of horses to try to protect the pastures of his Tuoba tribe from the attack of the Wei army.

Although the Monan grassland is vast, there are many Xianbei tribes, and the excellent pastures that can be used to raise cattle and sheep have long been divided, among which the Tuoba Department naturally occupies the most fertile grassland.

Before the Wei army attacked, the grassland was enough for the whole clan, and the Xianbei people of all departments were afraid of the power of the Khan of Tuoba and the strength of the Tuoba Department, so naturally they had no complaints.

But now, the attack of the Wei army has caused many tribes to lose their pastures, and they have not been protected, and they naturally complain about Tuoba Liwei.

In order to survive, their tribe had to go to the heavily protected pastures controlled by the Tuoba Department to graze, trying to get a small share of the meagre pasture.

Of course, the herdsmen of the Tuoba tribe refused to spit out their own interests, relying on the strength of their tribes, and ruthlessly drove away all the other tribes that entered their pastures.

For a time, the tribes, in order to compete with the Tuoba Department for pasture, were constantly in conflict with each other, and there were many deaths and injuries.

There was a conflict between the tribes in the rear, which naturally affected the fighting spirit of the Xianbei soldiers in Eagle City.

These Xianbei soldiers from different tribes can only be united for the common good.

Now, when they heard that their tribe had lost their pasture and was being driven away by the Tuoba tribe, they naturally became dissatisfied in their hearts, and the hostility between the soldiers became more and more serious, which made the morale of the already low morale even more and more depressed.

Tuoba had nothing to do, so he could only rely on his own prestige to suppress those dissatisfied soldiers, and at the same time persuade his Tuoba tribesmen to try to allocate a little pasture to help other tribes.

His efforts had little effect.

Although the pastures of the Tuoba Department are large, they are limited after all, and they cannot accommodate hundreds of thousands of other tribes to divide them, let alone feed millions of cattle and sheep.

Tuoba Liwei's life is getting more and more sad, and he can only helplessly hold on.

The enemy's life is not easy, but Su Zhe's life is tight.

What he does every day is to hunt and hunt, listen to the generals robbing the harvest of the Xianbei people, and then turn the clouds and rain with Ma Yunlu at night, enjoy the joy of the rain, and live a good life.

Su Zhe even felt that he didn't have to bother to attack Eagle City, just with the strong family strength of Great Wei, he could drag Tuoba Liwei to death.

At dusk on this day, Su Zhegang heard Wen Chou's report, claiming that he had robbed another Xianbei tribe, killed 3,000 enemies, robbed 1,000 women, and tens of thousands of cattle and sheep.

Su Zhe was in a good mood and was in a good mood, so he called a banquet in the tent and had a good drink with the generals tonight.

At this moment, the Imperial Forest Sergeant entered and arched his hand: "Your Majesty, the envoy of Xianbei, Tuoba Li Hu, is already outside the camp and wants to ask to see Your Majesty." ”