Cao Cao suggested that the tunnel send more men and horses to carry out a strong attack, Yuan Shao then dispatched more than 10,000 people to the three princes, Cao Cao was fully responsible for the attack of the tunnel, the tunnel gathered four princes, Cao Cao rushed to the tunnel and decided to implement two breakthroughs after careful analysis: on the one hand, arrange manpower to continue to dig the tunnel to the wider, and constantly expand the width of the tunnel, especially to both sides of the tunnel, in order to accommodate more soldiers, on the other hand, arrange a team to carry out a key assault in the pass, ready to tear the opening

Cao Cao finished distributing the army and then began to move, Zhang Liao Shouzhu in the pass arranged a large number of archers, waiting for the head to emerge from the ground at any time, as if waiting for fishing, from time to time the eastern army poured out of the tunnel, but soon became a live target for the archers to be shot to death, several people rushed out of the tunnel and were all shot to death, but the people who dared to die were still in an endless stream, constantly drilling out of the tunnel.

However, the Kwantung Army soon changed the way of attacking, they no longer rushed out bareheaded, but pierced out of the tunnel with shields, the bows and arrows of the archers were quickly blocked by the shields, the Kwantung Army continued to launch underground fortifications with the help of shield cover, there were many rushers, and more and more, Zhang Liao saw this and ordered the sergeants to start a fierce battle with these desperate Kwantung Army, he held a sword and hacked several people to death, and once again suppressed the offensive of the Kwantung Army.

Zhang Liao saw that the offensive of the Kwantung Army was becoming more and more fierce, and the tunnel was constantly expanding the scope, obviously this mouth was constantly expanding, if it continued, the consequences were unimaginable, Zhang Liao saw that the Guan Shang transferred a large number of sandbags, and soon understood, he commanded the army to carry the sandbags and throw them to the tunnel, and the sergeants moved together to carry the sandbags and threw them to the tunnel, which weighed more than several hundred pounds. Where is this sandbag, this is clearly a big stone, Zhang Liao immediately ordered the sergeants to carry this stone bag and throw it into the tunnel, and suddenly the stone was scattered in the tunnel, bag after bag, and soon the tunnel entrance was blocked by many big stones. The entrance to the tunnel was suddenly sealed with stones, and the exit of the Kwantung Army was blocked

Cao Cao learned that the tunnel entrance was sealed and couldn't help but break out in a cold sweat, the tunnel entrance was sealed by stones, it seems that it can't be opened anyway, if you look for other breakthroughs, it is not easy to complete the fortifications for a while, and now it's too late for the army to fight, it seems that the tunnel excavation method can only be declared dead, this road will not work. Cao Cao reluctantly withdrew his sergeant, but he soon thought of another plan to attack the city.

What's the solution? Cao Cao found that the front of the Tiger Prison Pass was very strong and difficult to compete with it, and a large number of men and horses gathered under the city, but there were only a few men and horses on this side of the city defense, if the siege was carried out from this side, the resistance was naturally much smaller than the former, so it was better to turn this group of men and horses to attack the city defense on the south side of the Tiger Pass. On the one hand, it can reduce the pressure on the frontal battlefield, and it may also be a breakthrough. Because at this time, the city defense on the south side seemed extremely empty for a while.

Cao Cao said that he could not delay, he commanded more than 10,000 men and horses to quickly press to the south side of the Tiger Prison Pass city defense, to the south side of the attack on the south side, at this time the south side of the Tiger Prison Pass on the city has no command of the general only a group of soldiers in the hand, Cao Cao's army shouted to kill the Tiger Pass, the soldiers on the city did not show weakness when they saw this. They quickly put the fortifications of the city into battle, but saw countless rolling logs and stones and bows and arrows fall together and smash into the besieging Cao Cao's army, which was quickly intercepted

Cao Cao saw that the army was intercepted, so he drew his sword and led the soldiers to attack the city. Cao Cao took the lead and led the soldiers to move forward, all the soldiers were full of morale and high spirits, and the fighting spirit of the siege was raised at once, and they struggled to kill the Tiger Pass, and many of them rushed to the bottom of the pass, and began to climb the city to attack, using hooks and ladders to climb the city.

The soldiers on the city saw that the Cao army was so fierce, and there was no leading general in the town, their hearts suddenly lost their opinions, and they were suppressed by the momentum of the Cao army, and the offensive of resistance weakened a lot, and the Cao army quickly climbed the city, and in the face of the powerful offensive of the Cao army, the soldiers in the city were a little unable to defend it, but at this critical moment, things quickly took a turn for the better, what a turnaround? That is, Zhang Liao and the sergeants have rushed to the south side of the city defense, and the backbone of the army has arrived in time, and the sergeants defending the city no longer have to panic, and their confidence has suddenly become full.

Zhang Liao saw Cao Cao storming the south side and expected that they were attacking the weak link, but he was now sitting on the south side, and the south side was no longer a weak link, Zhang Liao quickly commanded the defenders to carry out a counterattack, and the knife and axe men worked together to cut off the hook of the climbing city, and then began to throw rolling wood and stones to the soldiers who were climbing the city and the soldiers who were standing under the city and preparing to climb the city.

Cao Cao saw that the strong attack was blocked and was forced to give up the siege, and continued to specialize in the tunnel, he was ready to have a whirlwind battle with Zhang Liao so that Zhang Liao could not take care of each other, so it cost Zhang Liao's energy and patience, Zhang Liao was dragged to death, and the pressure was transferred for the frontal battlefield, at this time the frontal battlefield was in full swing, the army was killed and wounded, and the entire tiger prison became a carpet laid by people, accumulating thicker and thicker, the strength of both sides this time was unprecedented, and there were loopholes in some places on the fortifications on the tiger prison. Some of the corners of the walls had collapsed, and the walls were damaged, but the two armies continued to fight fiercely

Yuan Shao's cavalry has been killed and wounded, the infantry behind has already been replenished, continue to attack the city, at this time there have been soldiers on the city, but they were soon killed on the city, Guan Yu and the soldiers waved their knives and slashed up, quickly blocked the charge of the Kwantung Army, and then saw that the soldiers of the Kwantung Army under the city were trying their best to attack the city gate, and dozens of them carried a wooden stake weighing thousands of catties to the city gate of the Tiger Prison Pass.

At the city gate, Wen Ping and the sergeants were waiting, before he was ordered to prepare here to prevent the Eastern Army from stealing out of the tunnel and then turning to attack the city gate, so Wen Ping has been leading the army to prepare in front of the city, but unexpectedly there was a "knock, knock, knock" sound behind him, the entire city gate trembled, and the soldiers close to the city gate almost didn't shake their heads, this sudden change, such a big movement, surprised the Wen Ping army, Wen Ping quickly reacted: Not good! The enemy is attacking the city gate, be sure to resist it!

Wen Ping hurriedly ordered his sergeants to transport sandbags over, and all the sergeants started together, and soon soon the city gate was piled up with a hill-like sandbag fortification, and the entire city gate was filled in solidly, with three layers inside and three layers outside, and it was enough to make several trips, Yuan Shao's army hit the city gate hard outside the city, but saw that the city gate was more and more stable, and then it could not be shaken at all, and the city gate was as stable as Mount Tai, and the Kwantung Army had no choice but to give up the city gate and continue to attack the city.

At this time, the battle in the city was more intense, Guan Yu commanded back and forth, Guo Yan also strengthened scheduling, and Li Su continued to transport materials, although the offensive of the Kwantung Army was fierce and the Tiger Prison Pass was still firmly controlled by Guan Yu, and it was extremely difficult to capture, at this time, the Kwantung Army had paid a heavy price for the siege of the city, and the Tiger Prison Pass was still not overcome, Yuan Shao saw that the Tiger Prison Pass was well fortified, and the soldiers were full of food, if this kind of fight continued, it could only continue to increase the losses and pay a heavy price, so after repeated consideration, Yuan Shao decided to give up the attack, Withdraw the armies that had gone to attack.

The Kwantung Army was forced to retreat after several unsuccessful attacks, Yuan Shao led the remnants of the army to retreat in embarrassment, the Kwantung Army suffered heavy losses in this battle, tens of thousands of people died in the battle, especially the cavalry was almost lost, of course, Guan Yu also paid a lot of price, the casualties were not many, the casualties were only a few thousand, but almost all the materials for the city fortifications were put into the battle, if Yuan Shao moved down again, the Tiger Prison Pass had to be said to be dangerous, but Yuan Shao still gave up, and the Kwantung Army could not see hope at all

After these battles, more than half of the casualties of the Kwantung Army were greatly damaged, and the strength was greatly damaged, and the princes of the Eighteenth Route had no confidence in the future war, Yuan Shao's army returned to the same place after resting and preparing to discuss the matter of advance and retreat again, and the princes shouted again, and the entire Chinese army camp quarreled again.

The Kwantung Army was discussing in the camp after resting, and at this moment there was an urgent report from his subordinates: Guan Yu came over with 100,000 heavy troops to cover up, and the generals Guo Yan, Zhang Xiu, Wen Ping, and Zhang Liao around Dong Zhuo were all pulled out, and the lineup was menacing, and the army was like a tiger. ”

The princes hurriedly turned around at the bottom of the steps, and Cao Cao said first: "Guan Yu must have come to destroy us in one fell swoop and give us a fatal blow, the purpose is to completely defeat us!" ”

When Yuan Shao heard this, he was like five thunderbolts, and he trembled and said, "What should Yimengde do?" ”

"Guan Yu came prepared and came with heavy troops, so that the morale of the soldiers was greatly boosted before waiting for work, so from any point of view, we can't compete with him now, so we have to retreat!" Cao Cao persuaded. (To be continued.) )