Reinforcements are about to arrive, especially the lord who will come to Baishui Pass in person, which greatly encourages the defenders of Baishui Pass, especially those veterans who have seen Liu Cong's divine martial arts, and they are even more excited and begin to spread Liu Cong's past deeds in the army. The actions of the defenders of the water pipe burst made Cao Jun outside the gate very puzzled, and they didn't know why the gate was suddenly hot, passionate and generous. However, experienced soldiers guessed that it should be the enemy's reinforcements arriving.

After Cao Cao learned of the change in Guanshang, he also analyzed that Jingzhou's reinforcements might have arrived, but he didn't know whether it was from Chengdu or Xiangyang. And Pound should be the most puzzled, he really can't understand, why these soldiers are so optimistic with a letter of imminent reinforcements, even though the battle situation is at a disadvantage?

But soon he had a general understanding of the new lord he had not met from the mouths of the soldiers. And the performance of the defenders made Pang De even more emotional, what kind of sacredness is this Liu Cong, just with a letter about to be reinforced, tens of thousands of exhausted soldiers will be high-spirited in an instant!

The defenders' new look was not Pang De, but the Cao army in charge of the siege, which had been fighting day after day in both sides had begun to get tired and paralyzed, but the defenders' combat effectiveness was suddenly strengthened, making the Cao army suffer a lot and pay twice as many casualties as before, and the siege became cautious in the next few days.

Half a month later, Liu Cong and Zhang Jaw arrived at Baishui Pass. Baishui Pass was boiling again, and even the more than 30,000 people in the rear were eager to try it when they learned that it was Liu Cong who was there! Liu Cong handed over the matter of setting up camp to Zhang Jaw, and immediately inspected the entire Baishui Pass inside and outside the border accompanied by Wei Yan, Zhang Ren and others. Everywhere they went, the soldiers were greatly inspired.

Originally, after a long period of attrition, the defenders of Baishui Pass had only 35,000 people left, and the 15,000 people brought by Liu Cong could be put into battle on the second day, which was indeed a shot in the arm for the defenders! However, Liu Cong was still dissatisfied with the situation in the barracks after inspecting the entire barracks.

It is no wonder that the offensive and defensive sides fought fiercely in front of the pass every day, and the inside of the county camp could not be compared with the training in peacetime, and the 30,000 people on the periphery began to help build the military camp and communicate the canal. Later, because of the nervousness of the soldiers, even the stones and fortifications could not be put in place in time.

The daily household garbage and excrement of the soldiers began to accumulate inside and outside the barracks! Fortunately, it has entered autumn, and if it is in the middle of summer, not only is it easy to spread diseases, but also the soldiers are afraid that this smell alone will not be able to stand it!

Therefore, Liu Cong immediately made a decision and asked Dong Yun to take 30,000 people to start digging a canal outside the barracks, preparing to divert domestic sewage to the Baishui River. It's just that Wei Yan and Dong Yun are puzzled by Liu Cong's instructions to widen the ravines between the camp tents and dig a half-shaped deep ditch inside and outside Baishui Pass, which is more than three steps deep but less than one step wide, just like an ordinary county town. To say that this is a moat seems too narrow, to say that it is to smoothly channel the waste water in the barracks seems too deep......

"My lord, this deep ditch is just outside the barracks, but it will allow the people and soldiers to enter and leave the barracks." Wei Yan has been influenced by Liu Cong for many years, but he still doesn't understand Liu Cong's move.

"Wen Chang, how is the Cao army's attack in the past few days?"

"The offensive is a little weaker than the other day. Now that the lord is here, the soldiers of Baishuiguan will work together, and they will definitely be able to make Cao Cao return in vain. ”

"I'm afraid that Cao Cao won't be reconciled, so this deep ditch must not only tightly surround the military camp, but also extend to the foot of the mountains on both sides of the pass, and continue to extend forward as long as there is time!"

"My lord, what do you want?"

"The city wall of Baishuiguan is extremely strong, and the mountains on both sides are steep, which can be said to be a man's pass. And Cao Cao couldn't attack for a long time, but he refused to leave, and he would definitely find other ways to break through. And the best way to break through the Baishui Pass is nothing more than two, one is to bypass the Baishui Pass and look for opportunities from the mountains on both sides, and send a small group of troops through the mountains to attack directly from behind.

Cao Cao will definitely not use this method, and the small force will not play a role. If it is a large-scale transfer, it will definitely be discovered by our army scouts as soon as possible. When the time comes, our army will wait for the rabbits, and their losses will be even greater! If this method doesn't work, then there is only one way left! ”

"Digging tunnels?"

"Not bad! Therefore, our army must not only dig such a deep ditch outside the barracks, but also bring in the water of the Baishui River as soon as possible......"

"The lord is thoughtful, Yan admires!"

"Blocking the tunnel is just to prevent Cao Cao's sneak attack, to really make Cao Cao retreat, we still need to achieve a big victory on the frontal battlefield, only by letting Cao Cao's army experience the strength of our army can Cao Cao be soft.

So you have to work on the equipment. The current people are not enough, and it is necessary to recruit about 10,000 people to cut timber in the nearby mountains and forests as soon as possible, this time the prime minister brought a hundred skilled craftsmen from Xiangyang, except for the production of Zhuge repeaters, the rest of the people are all responsible for leading people to build catapults. ”

Dong Yun heard that he was still recruiting people, and hurriedly received orders to prepare, Dong Yun gradually acted as an agent for the affairs of Liangzhou from Zitong County, and he was also a little famous in the vicinity, and now it is wartime, and it is not difficult to raise 10,000 people, it only takes three or five days.

On the eighth day when Liu Cong ordered the excavation of a deep ditch outside the barracks, and on the third day when the deep ditch was connected with the barracks drain ditch and the Baishui River, a scout came to report that there was an inexplicable collapse at both ends of the city wall near Baishuiguan, and the water level dropped rapidly!

Everyone felt that at the scene, it was indeed the tunnel dug by Cao Jun who was ready to find an exit near the barracks and gradually lift it up! The ditch that had been flooded in advance blocked the way of the tunnel, and the water immediately penetrated the half-step-wide dirt and poured into the tunnel.

Cao Jun was originally a tunnel dug into the pass by sticking to the walls at both ends of Baishui Pass, but both tunnels were filled with water, and it is unknown how many people Cao Jun lost, but Cao Cao wanted to sneak attack the defenders from behind through the tunnel, which was an encouragement to the defenders of Baishui Pass, but it was a very big blow to Cao Jun who wanted to win quickly!

Pang De and the others were even more dumbfounded, he had followed Ma Chao for so many years, either a hearty horse battle, or a hasty and embarrassed escape. It's the first time I've heard of the two sides fighting through tunnels without meeting. And I have to admit that Liu Cong's judgment of the situation is very accurate, and he is very thoughtful about all aspects of the battlefield.

Of course, the defenders of Baishui Pass were not polite, taking advantage of the continuous decline in the water level, they took out the existing water in the barracks and rinsed the barracks well, and the sewage and dirty water went down the Baishui Pass and extended to the hinterland of the Cao army camp. Presumably, at this moment, Cao Cao is sending someone to fill in the hole!

Whether it's recruiting people or building catapults, it's all just for the sake of preparedness. The successful blockade of Cao's tunnel battle was only another defensive success. Liu Cong knew that Cao Cao's expedition to Hanzhong originally brought more than 100,000 people, although there were some losses in Yangping Pass, but after Zhang Lu surrendered, Cao Cao rectified the original soldiers and horses in Hanzhong, and it is estimated that 150,000 will be exceeded.

So on the day of blocking the tunnel, Liu Cong began to mobilize, asking Wei Yan to pick out five thousand elites from the army and prepare to carry out a surprise attack with Huang Zhong's cavalry! It is necessary to completely deter Cao's army and disintegrate the morale of the other party. It is not difficult for 50,000 people to pick 5,000. But Pound insisted on joining the war, and asked all his men to participate.

When Ma Chao brought Pang De and others to return to Shun, there were originally only more than 1,000 people, but during this time, Ma Chao's old troops came to take refuge, and the number gradually increased to about 2,000 people, although these people were allowed to go to the city wall for defense. But Pound himself has never seized the opportunity to make meritorious contributions. Now that Ma Chao is on the battlefield on the Eastern Front, he must not have the opportunity to make meritorious contributions.

Pang De knew that if this raid was successful, maybe Cao Cao would really retreat, and he and his subordinates would not have much chance to make meritorious contributions. As Liu Cong said, as long as Cao Cao retreated this time, it is unlikely that there will be a large-scale conflict in the next few years, and both sides will need time to consolidate their rule.

So Pound repeatedly asked for all the members to participate, and asked to personally lead five thousand assault infantry! This can make Wei Yan and his father-in-law quit, although the two successfully blocked Cao Cao and insisted until Liu Cong came, but compared with Gan Ning, Guan Yu and others in Jiangdong, their merits seem a little insignificant! If it weren't for the fact that his own troops were too small, Liu Cong strictly ordered him to stick to it, and the two of them would have already divided labor and cooperated to sneak attack!

Zhao Yun, Huang Zhong and even Liao Hua were also eager to try, especially Huang Zhong, who had nothing to do with him in this two-front war on the Eastern Front, while Zhao Yun had always been responsible for Liu Cong's personal safety, and could only lead the Chinese army to protect the lord. Now that Baishui Pass is on defense, the enemy will not be able to enter the pass for a while and a half, so Zhao Yun's hands are also itchy.

Seeing that his soldiers were holding their breath, Liu Cong decided to expand the scale of the sneak attack, Pang De's 2,000 people became a part of their own, but it was not the vanguard but the left wing, Huang Zhong and Zhao Yun led 5,000 cavalry as Zhu Li's vanguard, and went out of the pass at night, Wei Yan and Zhang Ren led another 5,000 infantry to go out of the pass as the right flank to cooperate with the cavalry.

Before leaving, Liu Cong personally went to the scene to inspect the equipment of the generals of various departments, and repeatedly told everyone that the sneak attack should be mainly harassment and intimidation, and that there should be no great results. At the same time, the reward method was also changed, requiring the generals of all ministries to accept it when they saw it! If you lose one person, you will have to deduct double the number of kills from that unit. The subordinates lost the generals above Quhou and Sima, and the exploits of several generals who led the team will be greatly reduced!

Everyone who sneaks out of the city is armed with a crossbow and a gun. Two days off! Let's go again in two days! In this way, in addition to Liu Cong and Liao Hua, the defenders of Baishui Pass were left with only three senior generals of Pang Tong, the military division, and the rest participated in the raid.

Liu Cong knew that as long as Gan Ning and the others finally captured Shaoxing, Cao Cao would definitely be alert, and if the large army and main generals were consumed in Hanzhong, Liu Cong would have enough strength to attack Jiangbei from Jianye!

Two days later, Cao's army finally recovered from the disappointment of the miscalculation of the tunnel, and the daytime attack returned to normal, while Wei Yan and the others rested in the camp tent as usual in the morning, waiting for the sun to go down and the enemy to return to the camp.