The Khitans, who had already relaxed, immediately became nervous again and began to line up to fight. However, they had been fighting for four days and three nights, and they were sleepy. In a hurry, where did he have time to face the battle.

At this time, a black line appeared on the road in the direction of Black Rock City. The Khitans could already hear the "booming" sound of horses' hooves.

As the sound of hooves approached, the Khitans standing at the front could already see the enemy's banner clearly - it turned out to be the banner of the commander of the Northern Route Army of the Sui Army.

Abao Cave couldn't help but be shocked: Yuwenshu is here? He didn't even attack Black Rock City? The main force turns to attack itself? But he hasn't gone to the city of Black Rock to threaten him to attack the city. Did he see himself as his primary rival?

However, now was not the right time for him to think about this problem, because he found that the enemy army had a lot of troops, at least 30,000 people, and 10,000 of them were cavalry, and it seemed that the Sui army had purchased a large number of horses from the Turks in the past two years, which was enough for all the provincial armies to organize a cavalry of 10,000 people.

And he has already seen it clearly, under a blue "Yuwen" flag, there is a veteran with three locks of long beard, and the legendary Sui Army North Route Army commander Yu Wenshu, the appearance is very similar.

"This Yuwenshu really looks up to us Khitans! The main force was dispatched to attack us. Abaosu laughed a few times, but his face had changed drastically.

"Could it be that Blackstone City has already been taken? Otherwise, how would the main force of the Sui army dare to turn around and attack us? Zamuhe asked tremblingly.

Abao's brow furrowed, and he realized that he had been fooled. Although the conditions promised by Goryeo were generous, the Khitans seemed to have an easy task to do, and they did not have to bear much responsibility. But there must also be a premise: that is, to be able to defeat the Sui army smoothly. If they were defeated by the Sui army, they would not only lose land in the end, but would suffer heavy losses.

At this moment, the cavalry of the Sui army had already taken the lead in the formation of the Khitans, and immediately the flesh and blood flew sideways, and the two sides fought together.

Originally, Abao Cave was not afraid of cavalry battles with the Sui army. Because the Khitans grew up on horseback since childhood, their riding skills were much better than those of the Sui army. Even the most elite cavalry of the Sui army was inferior to the Khitan cavalry in horsemanship.

But the problem is that now the Khitans are at a disadvantage in numbers, and they have all experienced four days and three nights of fighting, and their physical strength is exhausted, while the Sui army is at ease and waiting for work, and it is in an advantage in numbers, coupled with excellent equipment, it occupies an absolute advantage in the battle.

As soon as the two sides fought, the Sui army gained the upper hand. They already had a psychological advantage over the Khitans, and in addition, they had nourished their spirits and reached the peak of their physical strength and energy.

On the other hand, the Khitans, although they are the majority of them, have been fighting fiercely with Yu Wenming's army for a day and a night, and their physical strength is exhausted, and they suddenly encounter the main force of the Sui army here, and they have no intention of fighting with such a strong enemy. This psychological loss and fear has further widened the gap in combat effectiveness between the two armies.

Abao Cave saw that his soldiers were slaughtered by the Sui army like cutting wheat, and his heart was like a knife.

And at this moment, the Khitans were killing behind their backs. Abao Cave was angry, looked back, and saw that the Sui army that had been defeated and fled had been killed again.

They were just as tired and had suffered heavy losses. But the location in which it appears is quite good. Exactly behind the Khitans.

In this way, it happened to form a two-sided attack with the main force of the Sui army, which made all the Khitans panic.

Yu Wenming rushed to the front of his own army, the spear in his hand stabbed left and right, everywhere he passed, all of them were clothed, and every time he attacked, an enemy screamed and fell off his horse. The Khitan people couldn't help but be frightened. Later, the Khitans almost saw him and fled.

And the courage of the main general also drove the morale of the whole army, Wei Chi Jingde, Guo Ziyi and Lin Zimo did not hesitate, followed behind Yu Wenming, bravely killed the enemy, the Khitan people were killed like a mountain of corpses, blood flowed like a river, the rear army of about 8,000 people was killed by the Yu Wenming army with less than 3,000 people left.

This bloody battle began at nightfall and did not end until the next morning. Of the 30,000 Khitan troops, more than 18,000 were beheaded and more than 7,000 were taken prisoner, and only 5,000 of the Abao Cave brothers did not escape. The two Khitan tribal leaders, including Zamuhe, became the swords of the Sui army.

After Abao Cave fled back to the Khitan headquarters, he was so frightened that he no longer dared to attack, and the Xi people, Murowei and other grassland tribes who were originally about to move because of the heavy profits promised by Goryeo, after learning of the disastrous defeat of the Khitans, immediately stopped their pace of advancement, and did not dare to hit the tip of the Sui army's spear at this juncture. After all, no matter how good the conditions promised by Goryeo, they must be able to defeat the Sui army before they can be fulfilled. But if the Sui army can't be defeated at all, then no matter how generous the reward promised before, it will become a castle in the air.

And the reason why the Sui army of the North Road was able to conquer Black Rock City so quickly was because of the courage of Yuwen Chengdu. Armed with a phoenix-winged golden boring, he led the five hundred scimitars of the most elite of the Zuoling Guard, and on the second day of the attack on Blackstone City, he killed the city wall.

These scimitar soldiers were the elite of the Sui army, they were all dressed in heavy armor, and they were not afraid of ordinary arrows and slashes, but the scimitars in their hands were all Damascus black steel knives purchased from Da Shi. The blade was so sharp that the Goryeo soldiers could hardly do anything about it, and it often took more than a dozen lives to kill a scimitar.

You must know that the Goryeo army defending the city was originally much smaller than the attacking Sui army, and these scimitar soldiers, under the leadership of Yuwen Chengdu, quickly firmly occupied a position on the city wall they attacked, covering the follow-up troops to enter the city one after another through the ladder.

As a result, the western city wall attacked by Yuwen Chengdu was finally broken after holding on for four hours. Yuwen Chengdu killed from the city wall all the way to the west city gate, and then smashed the latch of the city gate with a boring blow and opened the west city gate.

In the cheers of the Sui army, the army poured in, and the Goryeo army soon had no fighters, fleeing and surrendering, and the defense of Black Rock City suddenly collapsed and fell into the hands of the Sui army.

When Yu Wenshu sent this information to Yu Wenming, he was also shocked to see that Black Rock City had broken so quickly, and secretly thought that his eldest brother really had the courage to be unsuitable. Let him smash Black Rock City alive.

And when he saw that Yu Wenshu's intelligence said that he found that the Xi and Murwei tribes were also gathering troops, and seemed to have the intention of going south to help Goryeo, Yu Wenming had an idea and thought of a plan to lure the enemy deep and annihilate the Khitan army in one fell swoop. He plans to use the ** Khitan army to kill chickens and show monkeys.

After he returned the plan to the camp, Yu Wenshu was also greatly surprised. I didn't expect my two grandsons to be so powerful, according to Yu Wenming's plan, even if they couldn't completely annihilate the Khitan army, they could lose most of them. And the price you pay will be small.

In this way, with the crushing defeat of the Khitans, the Xi and Murwei tribes must be afraid of the Great Sui and dare not help Goryeo anymore. After the capture of Black Rock City, the path for the Goryeo to flee to the northern prairie has been cut off, and the Sui army can catch turtles in the urn.

Therefore, Yu Wenshu followed Yu Wenming's plan, and after a slight modification, ordered the main force of the Sui army to cooperate. At the moment when the Khitan army was sleepy and ready to camp after a bloody battle, it launched a surprise attack. In this way, the expected victory was achieved.

Yuwen Shu was overjoyed, and immediately sent the battle report to Liaodong City, where Yang Guang was in the temporary camp, to ask for credit for Yuwen Chengdu and Yu Wenming's brothers.

He also got the news that the Sui army on the middle road and the Sui army on the south route were also good news. The Sui army believed that the second expedition to Goryeo was coming to an end. Maybe before the arrival of summer, everyone can destroy Goryeo and go back to celebrate the Dragon Boat Festival.

At the end of April of the ninth year of the Great Cause, the Sui army of the three routes had arrived at the Yalu River.

Gao Jianwu and Yiwen Zhide led the remaining Goryeo army, burned all the ships in the river, and withdrew to the opposite bank. Prepare for the final battle to defend Goryeo. If this battle is defeated again, the Sui army can successfully cross the Yalu River, and it can be killed under the city of Pyongyang, the capital of Goryeo, within three days. At this time, the strength, morale and confidence of both the Goryeo army had fallen to the lowest point. Perdition is almost inevitable.

At this time, people in Goryeo were also panicked, and some ministers and generals who had some connections in the Sui Dynasty had already secretly fornicated with each other. They prepared to stage a coup d'état, arrest him, and then surrender to the Sui army if the Goryeo king Gao Yuan persisted in resisting the Sui army after the first battle on the Yalu River, in order to save his family and property.

Yang Guang also arrived at the Yalu River at this moment, and he ordered the craftsmen and people of the army to start cutting down trees and making boats to cross the river, and strive to cross the Yalu River in mid-May and destroy Goryeo in one fell swoop.