Zamuhe was full of confidence, because he had already seen that there were not many people in the Sui army, and there were only more than 2,000 people lined up in front of him. In this plain area, if the dignified Khitan cavalry could not defeat the Sui infantry in the frontal charge, then they should have died a long time ago, and what else to talk about entangling the enemy and helping Goryeo win the war?

Three hundred zhang!

Zamuhe shouted with his spear in his hand and rushed forward, and the momentum of more than 5,000 horses galloping forward together was still very magnificent.

At this time, the Khitan cavalry had taken out their spears and sabers from the hooks on the back of their horses......

Now that he was getting closer and closer to the Sui army formation in front, Zamu Hedu vaguely saw the Sui infantry on the opposite side holding a shield and a gun looking nervously at the Khitan warriors who rushed over.

Two hundred zhang!

"Haha! These Sui people are really scared silly! We didn't even fire our arrows all the way. Zamuhe was ecstatic in his heart, and secretly said that as long as his heroic and invincible Khitan cavalry rushed into the formation of the Sui army, he would definitely be able to kill them without leaving a single piece of armor.

One hundred zhang!

At this time, the cavalry of the Khitans had already entered a high-speed sprint state, and at this speed, the tea kung fu could rush to the front of the Sui army's camp.

However, Zamuhe finally noticed something unusual: in the infantry queue of the Sui army, there was suddenly a middle-aged general riding a white horse, who was looking at him with a smile that seemed to be not smiling.

"That's not right! The performance of these Sui troops was too strange, they only numbered more than 2,000 people, and they were all infantry, how could they be so indifferent in this field battle on the plains? And his expression just now ......"

Zamuhe suddenly became alert, feeling as if some trap was waiting for him.

Fifty zhang!

"Everyone, stop! Don't rush! Something is wrong! Zamuhe hurriedly reined in his horse, trying to slow down.

He reacted in time, but his men were not so lucky. They still rushed to the ranks of the Sui infantry at a rapid pace......

I only heard a loud "boom", and the flat ground in front of the Sui army suddenly collapsed and became a long and deep trench, about two zhang wide.

The Khitan infantry that rushed in front fell into it at once, and the people flipped on their backs, screaming again and again.

Wei Chi Jingde smiled slightly, and in the afternoon he commanded the Sui army to go all out, digging a trench about 50 zhang long and 2 zhang wide on the soft black soil in front of the camp gate, and then covering it with some branches and weeds on the ditch.

At the same time, he also deployed the most elite sniper shooters in the Sui army nearby, sniping and killing Khitan scouts whenever they approached.

Therefore, the Khitan scouts could only observe from a few miles away, and saw that the Sui army was gathering in large numbers at the mouth of the valley, and said that they were building a camp, but they did not expect that they were digging trenches, so that now they have fallen into the trap.

The Sui army, which was already in full battle, would not let go of such a good opportunity. With Wei Chi Jingde's order, the spear and shield soldiers standing in the front row immediately squatted down, revealing more than ten rows of archers in the rear.

As early as when the Khitan cavalry began to charge, they used the overall uniform action to put the sharp arrows in their hands on the longbow that had been opened, and prepared to shoot. After the spear and shield soldiers crouched down, they immediately aimed their bows and arrows at the Khitan cavalry who was close at hand, but in a mess.

"Shoot!" Yu Chi Jingde pulled out his waist knife and shouted with all his might.

"Hum—"

More than a thousand longbow bowstrings trembled at the same time, making a terrible humming sound.

With this sound, countless elite iron arrows densely rose from the Sui army's infantry phalanx.

They flew over the heads of the crouching Sui spear and shield soldiers, over the trenches, and into the sky.

A moment later, the black-pressed arrow rained down from the sky like a raindrop, making a fatal "whoosh-whoosh" sound, and accurately dumped on the head of the densely packed Khitan cavalry at the other end of the trench.

However, in the blink of an eye, the Khitan cavalry, who were still trying their best to restrain their horses, fell like wheat harvesting.

"Second round salvo ready!"

Wei Chi Jingde's deep eyes did not show a trace of pity, he knew that war was a life-and-death struggle, and being merciful to the enemy was ruthless to his own people, not to mention that if these Khitan cavalry were allowed to rush through the defense line of Dongping Valley, it would be a horse and a flat river.

They killed behind the Sui army attacking Black Rock City, even if they didn't do anything, it was enough for the main force of the Northern Route Army to stop the siege and defend with all their might. In this way, the combat objectives of the Northern Route Army will be completely defeated. The entire plan for an expedition to Goryeo will also be greatly affected.

"Arrow wound!" His cold voice rang out again.

"Shoot the arrows!"

Just listen to the sound of "buzz-", and the terrifying hum sound sounded again. More than a thousand fine iron arrows rushed out from behind the spears and shields of the Sui army with a black cold light......

Behind the trench, the screams of soldiers after being hit by arrows were constantly heard from the Khitan cavalry group. One by one, the fierce and brave Khitan soldiers fell down unwillingly holding their chests under the ravages of this black iron arrow.

These 5,000 Khitan cavalry are also the elite of the Khitans, and they are all composed of herdsmen from various Khitan tribes, and their combat effectiveness and morale are very high. Abao Cave arranged for them to launch the first round of charge, but also to take the lead and break through the defense line of this valley mouth as soon as possible and kill to Black Rock City.

In Zamuhe's view, 5,000 strong and brave Khitan warriors could not be defeated in the face of 2,000 Sui infantry on the plain, at most because the Sui army was well defended and backed by the camp, so they could not rush across the Sui army's formation.

But now, these Khitan cavalry have suffered thousands of casualties before they have rushed to the Sui army's formation.

"We also have bows and arrows, let's take out the arrows and shoot at the Sui army! I don't believe that the Han people can shoot arrows better than the Khitans who grew up on horseback! Zamuhe shouted.

After hearing the order, the chaotic Khitan cavalry immediately took out sharp arrows from the quiver on their backs and began to shoot at the Sui army. The Khitan people's cavalry and archery skills were indeed much more powerful than those of the Sui army, and they shot extremely accurately. This pair fired, and casualties immediately began to appear in the Sui army.

And the Khitans who were trapped in the ditch also struggled to climb out of the ditch. However, as soon as they climbed to the ground, they were stabbed in the heart by the pikemen of the Sui army, who were waiting for them.

The joy on Zamuga's face didn't last long, and his expression became grim again. Because he found that when this pair of shots, the Khitan cavalry not only did not have the upper hand, but was suppressed by all the archers of the Sui army.

This is not because they are not good at archery, but because the Khitans are wearing leather armor, which is a light cavalry with poor protection. Some people even have animal skins wrapped around their bodies, and their protection is almost zero.

And the archers of the Sui army wore iron armor, and there were three rows of spears and shields in front of them to resist. Most of the arrows fired by the Khitans were blocked by shields. Even if a small half pierced through the gap in the shield and shot some unlucky guys. But that's a minority, after all.

"Chief, why don't we withdraw first! Next time, when you are well prepared, you will bring in earth to fill in the trench. Zamuhe's lieutenant said with a bloody face.

Zamuhe looked at the battle situation nearby, and saw that more than 5,000 Khitan cavalry had suffered more than half of the casualties, although they were still riding on horses, while running, desperately firing sharp arrows into the ranks of the Sui army, but the arrows they shot were resisted by the opponent's shield and heavy armor, and had little effect.

Although the archers of the Sui army were not as accurate as the Khitans, they used strong crossbows with a longer range and greater strength, and as long as they shot a Khitan cavalryman, they could easily pierce their light leather armor and take their lives.

"Hateful! If only there was no such trench! Zamuhe clenched the spear in his hand and said angrily.

If it weren't for this ditch, he would definitely have been able to rush across the two thousand Sui troops, no matter how good their weapons and equipment were.

"General! If you don't withdraw, everyone will be here to explain! You know, this is all the elite of our Khitans! The lieutenant said with a hint of tears.

Zamuhe woke up at this time, and after a little thought, he nodded and said, "Okay!" Withdraw first! I discussed it with the Apo Cave brothers, and it seems that we will have to fill this ditch with infantry first. ”

The Khitan cavalry really came and went like flying, coming and going as fast as they could.

In less than half an hour, they were completely evacuated, leaving corpses all over the ground.

After Zamuhe returned, seeing that it was already dark, he discussed with Abao Cave for a while, and decided to attack again early tomorrow morning. After all, in the dark, cavalry can be a larger target than infantry, and it is much easier to be a target.

This time, Abaogu decided to let his younger brother Abaosu lead 5,000 stronger Khitan herdsmen, ready to attack with dirt. Their main task was to fill in the ditch in front of the camp, destroy the defensive facilities that hindered the cavalry's attack, such as horse rejection and tripping ropes, and prepare for the attack of their own cavalry.