Guo Jia was not surprised by his surprise, because in his eyes, Cao Zhang was just a child, and the child needed to learn, and there were many things they could not imagine.

Shaking his head, Guo Jia explained to him carefully: "Ziwen, you have also been fighting with Lord Sikong for many years. Do you know what is the most commonly used method of siege in the siege?"

"There is no fight, but this requires sufficient supply from the rear." Cao Zhang's answer was very straightforward.

Guo Jia nodded: "Yes, this is why I took the initiative to attack. If the opponent surrounds and does not attack, and then builds a double-layer high wall, you can attack and retreat and defend. But what about us? Assaulting from the inside to the outside requires two layers of defense. This means that we will die. Moreover,... there may not be no third and fourth layers. Moreover, if it is in that case, what should we do if our army is exhausted?"

"You are right, but the military advisors, they use light infantry as the front line and follow the siege equipment behind them, obviously for the sake of quick battles and quick decisions." Cao Zhang asked again, very humble.

Guo Jia shook his head, and he did not agree with this statement: "What if it was the illusion they deliberately made for us? As you said, if they were really eager to siege the city, they would definitely not put the siege equipment at the end of the team and would not protect it. Obviously, they wanted to deliberately show it for us, so that they misjudged and defended the city walls. Of course, this might be the norm for their marching, but I cannot wait and test at the risk of defeat."

"So that's it, I've been taught."

Guo Jia nodded slightly, turned to look at him, his eyes warm and sincere: "Ziwen, since you ask me today, I might as well say something more. In fact, my subordinates are not over yet. In addition to Wenze, Ye Yi, Mancheng and others, I also arranged two teams of archers to detour from the back door. They are mainly responsible for hiding themselves and can harass each other when necessary, regardless of advance or retreat."

"I understand, the military is completely missed, our army will win this battle!"

Guo Jia had long heard this and his ears were calloused. He didn't care at all. Instead, he asked Cao Zhang another question: "Then I ask you, why do I want Wenze to lead the cavalry out of the battle?"

The cavalry of the Han Dynasty was divided into roughly three types, namely heavy cavalry, light cavalry and ranger.

Rangers are divided into rangers and crossbow cavalry. The difference between these two types of cavalry is that in terms of weapons and equipment, the rangers are equipped with tripping ropes, darts, flying spears, and caltrops, equipped with iron mesh, ring-headed knife or iron-headed short-handed hammer, and arm shield.

The crossbow cavalry are equipped with archers, thirty-six arrows, and nine of them with armor, police whistles, three clusters, and heavy swallow arrows. Although there are arm shields, their weapons are ring-headed swords with inverted blades, and there is also an iron lump hanging on the knife ring.

Cao Zhang thought for a while and said, "In contrast, the Rangers have better control capabilities. Although General Wenze is mainly responsible for restraining the front army of the two enemy camps, he has to join forces with Zi Lian Shu, because he has to face heavy armored infantry, the combat effectiveness of the bow and crossbow cavalry will be greatly reduced."

"Well..." Guo Jia pondered for a moment and shook his head: "As you said, I can completely let the crossbow cavalry launch rockets and burn those heavy armors with one fire?"

Cao Zhang couldn't answer this time. He thought for a long time but still didn't have any. "Military advisor, I don't know, you'd better talk."

Guo Jia smiled and looked at Yu Jinbu who had already started fighting in the distance, his eyes became much deeper: "Actually, this is just a layer of window paper. It's dark night now, I can't prevent fire, so I can only let the Rangers attack."

"Ah! I understand!" Cao Zhang exclaimed when he heard this, and suddenly realized: "You don't want them to know that the siege weapon has been burned. At that time, they will only think that the rear army was raided, and they will not be overly nervous. Join forces together!"

"That's right!"

Guo Jia also felt the spirit when he saw him revealing the secret: "Ziwen, in fact, commanding the army not only requires a big opening and closing, but also pay attention to details. It is possible that if a very small detail cannot be handled, it will lead to a loss. I just lied to Zixiao. He was impatient and could not stand loneliness. Now it is just the first battle. Although our army will win, we can't send all the generals out, right?"

Speaking of this, Guo Jia paused for a moment, then stared at him tightly: "There is another point, because it is a battle to defend the city, I am not very relieved to you, do you know?"

Now, Cao Zhang blushed, but he knew that Guo Jia was right, and he knew the best of his personality.

According to Guo Jia's plan, Yu Jin successfully attracted the attention of the Second and Third Legions. He used the mobility of the Rangers to spread iron caltrops, and used iron nets and other objects to harass and intercept them, successfully restraining them.

Li Dian and Zhang He's army also broke out from the left and right at this time. As for Cao Hong, he took advantage of the chaos launched by the three armies to secretly bypass the heavy cavalry and attacked the heavy armored corps behind Kushan.

From the moment the battle began, Guo Jia was sure to win.

As Cao Hong's heavy cavalry successfully raided the enemy's formation, he personally released a rocket. After Yu Jin saw it, he immediately led the rangers to withdraw from the battlefield. Zhang He and Li Dian made a seamless connection with him, and Zhang He also allocated some of his troops.

Go around the back of the third and fourth legions to prevent them from appearing in case they want to turn back and there is no way to stop them.

Yu Jin led the cavalry to the vicinity of Cao Hong's army, but did not launch an attack directly. Seeing that the cavalry on their side were charging repeatedly and the formation of the heavy armored corps gradually became torn, he then gave the order and personally led his troops from the flank to launch an attack.

The heavy armored corps, which had been rushing to the ground by heavy cavalry and were dizzy, were immediately disintegrated by Yu Jin's struggle, and the last trace of fighting spirit was shattered. In the blink of an eye, he threw away his armor and retreated back.

Cao Hong and Yu Jinxin were like a sympathy, and neither chose to chase them, but cut off all the siege equipment they had discarded and destroyed.

Front side.

Although Li Dian and Zhang He led their troops to entangle the enemy, their numbers were far apart, so the two did not dare to attack fiercely, so they could only adopt array advancement to control the enemy within a certain range and prevent them from breaking free.

At the top of the city, Guo Jia and Cao Zhang were very happy to see the situation outside as expected. At this moment, a firearm suddenly flew into the sky at the farthest point of the enemy's formation.

When Guo Jia saw him, he knew it was Yu Jin. Cao Hong was successful and frowned. He sneered a deceitful smile on his lips, and turned to Cao Zhang.

"Ziwen, I know you have always been eager to try it out. Now I will give you a chance to lead 4,000 soldiers to fight with your uncle Xiao, and work with Zhang He and Li Dian. Be sure to defeat one of his two legions, but only this can be stopped. The remaining people, including the defeated soldiers, are not allowed to chase, and are not allowed to fight. Once you succeed, try to end the battle before dawn!"
Chapter completed!