After vetoing Yan Pu's strategy, Zhang Lu directly asked Yan Pu to retreat.

The next day, Zhang Lu directly ordered a strong attack on Xicheng County.

As Zhang Lu's army attacked, Wang Kai quickly led Luo Cheng, Wei Chigong and Huangfu Jianshou to the city tower to command the defense.

After defeating Zhang Lu's attack again, Wang Kai pulled Luo Cheng aside and said to him: "Shixin, last night I and Brother Huangfu finally came up with a plan to break Zhang Lu's army, I want you to lead 500 people to the upper reaches of the Lan River tonight to cut off the river. ”

Luo Cheng was very surprised when he heard this, because he had already guessed Wang Kai's thoughts.

Immediately after, Luo Cheng cautiously asked, "Lord, do you want to release water to flood the enemy?" ”

Seeing that Luo Cheng said it himself, Wang Kai nodded and replied: "Exactly, now that the enemy is outnumbered, if you want to defend Xicheng, you can only use Lanhe." Luo Cheng suddenly looked worried when he heard this.

Seeing this, Wang Kai laughed and said, "Shixin, don't worry! I have already calculated that as long as we arrange stones at the west gate, then the water of the Lan River will go from the moats on both sides of the west city, and at that time, only Zhang Lu's army can be harmed. ”

Luo Cheng only received the order at this time.

Besides, Zhang Lujun rested for a while and launched an attack on Xicheng County again.

After the stubborn resistance of the defenders of the city, Zhang Lu's army attacked again for a whole day but without results.

After nightfall, Luo Cheng quickly left Xicheng County quietly with five hundred elite soldiers according to Wang Kai's instructions and rushed towards the upper reaches of the Lan River.

After Luo Cheng arrived at the target location, he looked at Lanhe and ordered: "All the soldiers listen to the order, and quickly cut down wood and build a wooden fence for me." ”

The five hundred elites under his command were immediately dispersed after the order.

Just when Luo Cheng's side was in full swing, Wang Kai also ordered Wei Chigong to collect stones in the city to block the west gate of Xicheng County.

After collecting for a while, when Wei Chigong found that the stones were not enough, he immediately found Wang Kai and reported the matter.

Knowing that there were not enough stones in the city, Wang Kai had no choice but to ask the soldiers to demolish the dilapidated houses in exchange for wooden blocks to block the door.

The next day, Zhang Lu couldn't think of a better way to break the city, so Zhang Lu continued to use crowd tactics to attack the city.

Seeing this, Wang Kai commanded the soldiers to hold on while asking Wei Chigong to block the door quickly, because he wanted to defeat Zhang Lu faster.

After five days of preparation, Luo Cheng's side has successfully cut off the Lan River, and Wei Chigong in the city has also completely blocked the West Gate.

Wang Kai saw that Wei Chigong had completely blocked the West Gate, and he immediately sent a messenger to contact Luo Cheng and make an appointment.

After Luo Cheng received the contact, he immediately informed the messenger of the situation on his side.

Soon, the messenger returned to Xicheng County with Luo Cheng's news.

Wang Kai, who received the news, immediately waited happily, because the time agreed between Wang Kai and Luo Cheng was two days later, and there would be a wave of flood season in the Lanhe River two days later.

Although Wang Kai was waiting for the day when the water would be released, he was not idle, because Zhang Lu had been sending soldiers to attack Xicheng.

Two days later, with the arrival of the flood season, Wang Kai, in order not to injure the people by mistake, he let the people all gather at the high point in the city.

Although the people were very reluctant, they could only reluctantly obey the arrangement under the mandatory requirements of Wang Kai's subordinates.

Then turn to Luo Cheng's side.

When he saw that the water level of the Lan River suddenly rose again, Luo Cheng immediately understood that it was time to open the gate.

Immediately, Luo Cheng ordered: "All the soldiers listen to the order, now let go of the wooden fence and release water to me." ”

After receiving the order, the 500 soldiers under his command immediately pulled the rope and began to destroy the wooden fence.

Through the concerted efforts of the soldiers, the wooden fence was finally destroyed.

At this moment, the Arashi River, which had passed through the impounded and rising water, rushed down like a tiger.

Seeing this situation, Luo Cheng silently prayed for the people in his heart.

Then turn to the Zhang Lu military camp outside the West Gate of Xicheng County.

Because Zhang Lu and the others didn't know that Wang Kai was using Lanhe, the soldiers in the barracks didn't notice any danger.

When the water of the Lanhe River was about to appear in front of Zhang Lu's military camp, the soldiers in the military camp reacted.

Soon, the soldiers shouted in panic that the water was rising.

When Zhang Lu and Yan Pu in the barracks learned that the water of the Lan River was about to rush down, they were both quite shocked, because they didn't expect that their useless tricks would be used by Wang Kai instead.

Zhang Lu and Yan Pu, who came back to their senses, also quickly fled to the heights.

Before the soldiers in Zhang Lu's army could escape, the water of the Lan River instantly swallowed Zhang Lu's military camp and rushed towards Xicheng County.

Because Wang Kai had prepared for it, the water of the Lan River did not break through the city gate when it hit the west gate.

Eventually, the waters of the Lan River went away from the moats on both sides as Wang Kai had envisioned.

After three hours of discharge, the water of the Lan River slowly calmed down, because the flow of the Lan River was not particularly large, if it were not for Luo Cheng to build a wooden fence, the water of the Lan River would not have formed a flood at all.

Wang Kai, who was on the city tower, saw that the water of the Lan River had receded, so he ordered Wei Chigong to lead his troops to attack from the north gate, and he himself took Huangfu Jianshou out of the south gate.

At this time, Luo Cheng also led five hundred soldiers to slowly rush towards Xicheng County.

Besides, after Zhang Lujun's soldiers passed through the impact of the Lan River, most of the soldiers were washed away by the river, and only a small number of soldiers survived under the leadership of Zhang Lu, because these soldiers were all people with mounts, and their escape speed was relatively fast.

On a small hillside, when watching the water of the Lan River slowly recede, Zhang Lu's heart was dripping blood, because his heart was all in the barracks.

When he thought that Luo Cheng had destroyed his vital power without much effort, Zhang Lu suddenly raised his head to the sky and roared.

At this time, Yan Pu looked at Zhang Lu, who was very sad, and also blamed himself, because he didn't expect Luo Cheng to have the courage to release water.

Immediately after, Yan Pu said to Zhang Lujin: "Lord, after this battle, we have suffered a great injury, and the minister implores the lord to quickly withdraw to Nanzheng County and use the believers to hold the city, if Luo Cheng raises troops to kill, we will not have the strength to resist at all." ”

After hearing this, Zhang Lu endured his grief and agreed.

At the same time, Wei Chigong and Wang Kai also led their own troops to clean up the battlefield, because many drowned Zhang Lu soldiers appeared on the road.

It didn't take long for Luo Cheng to assist Wang Kai when he returned.

After several days of cleanup, the dead bodies near Xicheng County were all gathered.

In order not to produce the plague, Wang Kai ordered Wei Chigong to burn the corpse with fire.

When he received Wang Kai's military order, Wei Chigong acted without hesitation.

After disposing of the dead bodies, Wang Kai immediately ordered someone to count the results of the battle.

After knowing the results of the battle, Wang Kai found Huangfu Song and said to him: "Brother Huangfu, this battle wiped out Zhang Lu's living force in one fell swoop, I should really thank you, if you hadn't proposed it to me, I might still be confronting Zhang Lu now!" ”

"Brother Xinhaoxian's words are serious, since I came to join you, I am embarrassed to rely on it if I don't make some credit."

Seeing Huangfu Jianshou say this, Wang Kai immediately looked at each other and smiled at Huangfu Jianshou.