Cao Xiu didn't lie, it was true that there would be reinforcements in a few days, but it was a question of how many reinforcements there were. Yanzhou is the foundation of Cao Cao, in order to prevent Yuan Shao from crossing the Yellow River and attacking Xuchang directly, it is impossible for Yanzhou's army to mobilize much, and Cao Xiu recruited reinforcements from Bishui Pass and Luoyang.

He saw very clearly that as soon as Tongguan was lost, the remaining Bishui Pass and Luoyang would not be able to hold it at all, and it was better to concentrate all the troops in Tongguan, even if he couldn't hold it, he could delay Liu Bei for a while longer and buy time for Cao Cao. The total number of reinforcements from Bishui Pass and Luoyang is not more than 10,000, and even if they are all sent, it is just a drop in the bucket.

"Master Xun, I'm afraid it really won't last long!" Cao Xiu muttered in his heart. At this time, the only hope in Cao Xiu's heart was the letter sent to Xuchang.

On the second day, Tongguan was under the city.

Liu Bei led the army to array under Tongguan, looking at the dozens of behemoths in Yuan Shu's army not far away, and was amazed in his heart. Dozens of catapults lined up in a neat row look spectacular.

"With such a heavy weapon, Tongguan must be able to go down with a snap of his fingers." Liu Bei sighed lightly.

Yuan Shu looked approvingly at the catapult built overnight in front of him, and shouted in a low voice: "Release!" ”

The soldiers who had already prepared quickly began to move, but in a few moments, countless boulders roared towards the Tongguan city wall.

"Lie down!" Looking at the countless behemoths in the air, Cao Xiu's eyes were full of horror, and he shouted urgently.

This is not the first time that the catapult has appeared on the battlefield, the princes of the world have long been on guard against this, and have figured out how to guard against this thing, Cao Cao originally captured Tongguan was relying on the benefits of the catapult, but he did not expect that now the feng shui turns. was also in Tongguan, but the people who were attacked were replaced by themselves.

When Cao's soldiers heard this, they scattered directly, and each found the corner of the city wall, and fell to the ground one after another.

"Boom! Rumble! ”

Countless boulders crashed into the walls, but many more missed. And even if the soldiers of Cao Xiu dodged under the command of Cao Xiu, the losses were not much. Except for a few who were directly smashed with bad luck, the rest of the soldiers were almost unharmed, and even if they were hit by the flying rubble, they were only slightly injured.

Yuan Shu was not surprised to see this, and continued to order his soldiers to throw boulders, especially against the city towers and gates of Tongguan, focusing on the attack.

Countless boulders flew up, heading towards Tongguan, and the soldiers under Yuan Shu's command took turns to bombard continuously, until the prepared boulders were thrown away, and half an hour had passed. However, the walls and gates of Tongguan seem to have remained unchanged and are still standing, except for some damage and collapse on the city walls.

"The danger of Tongguan really lives up to its name!" Yuan Shu exclaimed.

"Drums, strike!" Fa Zheng said in a low voice.

The rapid sound of drums sounded, and Huang Zhong and Pan Feng led the army to rush towards Tongguan. And Liu Beijun had already launched a charge as early as the moment the stone throwing ended. The two sides went straight to Tongguan on the left and right, and the crazy siege battle began again.

The battle lasted from morning to evening, and did not stop at all, and under the fierce fighting of the three parties, the entire city wall of Tongguan was almost completely covered with blood. Yuan Liu each left more than 2,000 corpses, and after taking away more than 4,000 defenders of Cao's army, he retreated. That night, Yuan's army carried out another sneak attack, which kept the defenders of Tongguan awake at night.

On the morning of the third day, it was a new day. On the wall of Tongguan, in addition to Cao Xiu, who has been waiting for the battle and has never left, there is one more energetic strategist, Chen Deng.

As soon as he got the letter from Cao Xiu, Xun Yu guessed Liu Bei's plan, and immediately asked Chen Deng, who was the best at military strategy and the art of war, to gallop to Tongguan with 5,000 reinforcements.

Chen Deng also knew that the matter was urgent, and he rushed to Tongguan last night with almost no stop, and the starry night galloped.

"Chen Junshi, you see, Yuan Shu and Liu Bei are attacking almost day and night, and if they continue like this, they won't be able to hold Tongguan in a few days." With a backbone to rely on, Cao Xiu finally breathed a sigh of relief, and put away the calm and anxious words that had been disguised on the surface.

Chen Deng looked at the camp set up by Yuan and Liu's armies in the distance, and the corners of his mouth raised slightly: "It's okay, a certain plan has its own." Although Yuan and Liu's second army is strong, it is only an alliance after all, not to mention that Liu Bei and Yuan Shu were old enemies, and the gap between the two sides is difficult to sell. Yuan is strong and Liu is weak, as long as I use a little means, the other party will definitely be defeated. ”

Cao Xiu's face moved slightly: "Is the military advisor planning to use the discord strategy?" ”

Chen Deng shook his head lightly: "Yuan Shu and Liu Bei are not mediocre masters, at this time, it is completely ridiculous and generous to use the discord strategy, they will definitely not believe it." They don't trust each other in the first place, and their alliance with each other is just forced by the situation, so how can they be separated? ”

"What strategy is the military advisor going to use?"

Chen Deng shook his head slightly: "Recently, the other party will definitely strengthen its defenses, or defend the city wall first, and then talk about it in a few days." By the way, did I get the catapult I dismantled? ”

Cao Xiu clenched his fists and said: "According to the instructions of the military advisor, I have asked the soldiers to disassemble and reassemble the catapult into a trebuchet, and it will be installed on the city wall later." ”

"Hmm." Chen Deng nodded, and turned his head to look at the inner city behind him that he ordered his soldiers to build overnight: "Let me see what other tricks Yuan Highway and Liu Xuande have." ”

Soon, Yuan Shu and Liu Bei once again reorganized their army and came to Tongguan, and Yuan Shu placed the catapult at the front of the army as usual, preparing to come with several rounds of stone-throwing to hit the morale of the Tongguan defenders.

However, as soon as Yuan Shujun's catapult was pushed up and set up, before Yuan Shu could give the order, he heard a familiar and terrifying roar in the air.

"Boom! Rumble! ”

Countless boulders fell from the sky, enveloping the vicinity of the catapults.

"What's going on?" Yuan Shu said with a dull gaze.

Before Yuan Shu could react, a large number of boulders had already fallen, not only smashing three or four catapults, but also two boulders directly smashed into the defenseless army, killing and wounding countless people.

"Spread out! Retreat! Yuan Shu and Fa Zheng hurriedly shouted. The sudden blow made the two of them a little panicked, and they retired one after another.

After paying for the damage of dozens of soldiers and three catapults, Yuan Shu withdrew from the range of the trebuchets above Tongguan.

"Hyozhi, what should I do now?" Yuan Shu asked.

Fa Zheng looked at Tongguan from afar, saw Chen Deng who stood up on the city wall at some point, looking at the other party's confident eyes and a faint smile on the corner of his mouth, Fa Zheng sighed lightly: "Lord, now that the morale of the army is low, let's withdraw to the camp for the time being." ”

Chen Deng's appearance directly made the already one-sided situation confusing again.

Liu Bei saw the boulders constantly emitting from the Tongguan city wall, and a trace of solemnity flashed in his eyes, and then Yuan Shu's injury and withdrawal made him sigh directly, and he also led the army back to the camp.