The word siege means that the people outside the city want to go in, and the people in the city want to come out. During the days when Zhou Yu was full of ambition to train troops and accumulate grain, dig deep tunnels, and prepare to attack Nanjun, Cao Ren of Nanjun was also thinking hard about how to relieve the siege because there was less and less grain and grass in the city.

It is very coincidental that Cao Ren's idea coincides with Zhou Yu, and the way he thought of it was to dig a tunnel!

Cao Renfang's explanation of this yì, everyone also has different opinions, which is roughly the same as Zhou Yufang's original doubts, what if it is discovered by the locality? It is nothing more than being cautious and careful, beware of enemy attacks during the day, and working overtime at night to carry out secretly.

Therefore, at the same time that Zhou Yu was digging tunnels into the city, Cao Ren was also arranging for people to dig tunnels outside the city, and both sides were secretly carrying out this huge project.

At dusk that day, Zhou Yu's tunnel was finally completed, and the exit was in a dry well in Nanjun City, and Cao Ren's tunnel project had also been completed, but the exit was behind Zhou Yu's camp.

Zhou Yu was very excited, glad that there was no interference or news leakage during the construction, God helped me! Can God take care of it? Zhou Yu immediately sent Gan Ning to lead 3,000 soldiers and horses to infiltrate the Nanjun city along the tunnel, as an internal response, and at the same time gathered the rest of the soldiers and horses, and at the same time launched a strong attack on the Nanjun city.

Countless Jiangdong soldiers, carrying long ladders, rushed towards the city wall, and at the same time, another group of soldiers who were not afraid of death, set up a pontoon bridge, pushed the giant trees that crashed into the city gate, and went straight to the city gate.

For a while, the horses neighed, the drums shook the sky, and Cao Ren on the city wall sneered, as if he was waiting for this moment to come, only to see him wave his big hand, the arrow feathers were like locusts, and the sky and the sun were shot at the Jiangdong army, and a large number of rolling wood boulders rolled down from the city wall at the same time.

Although the attacks were repelled by Cao Ren again and again, and the casualties were not small, Zhou Yu was determined to win this battle, and constantly issued orders to attack, and groups of Jiangdong soldiers continued to climb the city wall.

The sunset gradually set, and the blood-red afterglow filled the entire battlefield, Cao Ren laughed, "Haha, Zhou Yu'er, I don't know whether I live or die, I will let your whole army be wiped out today, and you can't go back to Jiangdong." ”

"Cao Ren Pifu, I don't know that death is coming, see how long you will be rampant." Zhou Yu had a contemptuous smile on his face, but he was calculating the time in his heart, so he could only hold on until dark, so that Gan Ning, who had sneaked in secretly, could launch a fatal blow from the rear.

The three thousand soldiers and horses led by Gan Ning walked through the tunnel very carefully, and the sky gradually darkened, Gan Ning was very happy, it was a good time to sneak attack.

If things are too smooth, then there is no story. Just as the soldiers in front of them had just tied their ropes and were about to rush out of the dry well, a tragic thing happened, and a child in the city happened to pass by this remote dry well, and mischievously poured a soak of urine into the well, which happened to pour on the face of a soldier in front of him.

The child may be more angry, the urine is hot, the soldier who was urinated on his face didn't know what was going on, subconsciously sighed, wiped the water droplets on his face, with a strong smell of urine, and couldn't help but complain again, it's really fucking unlucky!

Hearing the movement in the well, the child curiously lay on the edge of the well and looked down, and what he saw was a hideous face looking up and was so frightened that he ran away, shouting as he ran: "There are monsters in the well!" There are youkai in the well! ”

Gan Ning was shocked in his heart, vaguely felt that something was not good, and hurriedly ordered to rush out quickly, and what was even more tragic was that a team of Cao soldiers who supported the front passed here.

Hearing Xiao Tong's shouting, he intercepted him, although Xiao Tong panicked, words do not reach, but the deputy general of the team leader is responsible for digging tunnels, vaguely aware that there must be a big secret hidden in the well! With twelve points of caution, the adjutant general immediately rushed over with the army.

A dozen soldiers who had just rushed out of the well, and before they could gain a firm foothold, they were killed by the soldiers who rushed to the well. In this kind of narrow wellhead, it can be said that a man is not open, Gan Ning suddenly felt miserable, and could only order the soldiers to release arrows from above, but, regardless of the effect of the trick of releasing arrows at the bottom of the well, everyone must have guessed a result, that is, Gan Ning and his party could not rush out either.

This matter was quickly reported to Cao Ren urgently, and Cao Ren was really shocked, if it wasn't for the fact that God had discovered the tricks of the Jiangdong soldiers at the last moment, he was afraid that at this time the southern county city had completely fallen.

While directing his soldiers to continue to resist Zhou Yu's onslaught, Cao Ren ordered the wellhead to be defended to the death, and at the same time ordered people to immediately dig a ditch to divert water, and pour water from the nearby city river into Zhou Yu's tunnel.

Zhou Yu was looking forward to the action on Gan Ning's side, waiting for the moment of victory to launch a full-scale attack! However, after holding out for several hours and seeing no movement, he finally couldn't sit still, and sent several groups of people to inquire what was going on.

Finally, a soldier in the tunnel reported that the operation had been discovered, and General Gan Ning was fighting hard at the wellhead, but he couldn't break out of the well.

Ah! Zhou Yu was so angry that he slapped his thigh and almost vomited blood again, but he also knew that Gan Ning was in a deep predicament and something was wrong, so he hurriedly ordered: "Quickly order General Gan to return!" ”

"Governor, the tunnel has been discovered, it is better to withdraw the troops first and then think about it in the long run." Lu Su hurriedly stepped forward to build a yì road.

"Hmph, even at the beginning, I didn't rely entirely on tunnels to capture Nanjun. In my opinion, Cao Ren suffered heavy losses, and with one blow, he will definitely be able to take Nanjun before dawn! ”

At this time, he should have sounded the gong to withdraw his troops and could not fight again, but Zhou Yu, who had failed repeatedly, had been carried away by the failure, and the authentic plan had fallen short, so he wanted to forcibly attack Nanjun City.

Lu Su persuaded hard, but Zhou Yu had already made up his mind, and all the soldiers in front were red-eyed, and no one wanted to withdraw troops at this time!

Here, the annoyed Gan Ning was still stubbornly rushing outward, but every soldier who tried to rush up was ruthlessly killed by Cao Bing who guarded the well.

It lasted for almost an hour and lost hundreds of people, while the other side waited for almost no casualties. Gan Ning knew that this matter was not feasible at all, and he could no longer make unnecessary sacrifices, so he had to call the army to return from the tunnel.

But when they were halfway there, the river in the city had been led to a dry well and poured along the tunnel.

"Retreat!" Gan Ning suddenly panicked and hurriedly ordered.

The tunnel was narrow, and it was not easy to walk quickly, but the water level in the tunnel was getting higher and higher, gradually overflowing the soldiers' chests, and the soldiers' breathing became more and more difficult, and their movements became more slow.

The water level finally overflowed overhead, Gan Ning's water was fine, and he struggled to swim back in the potential water, and when he finally drilled out of the tunnel from the original road, there were less than 1,000 soldiers and horses left with him.