Now that the Bingzhou army has encountered great difficulties in attacking the city, Du Yu and the others are naturally worried, even if Cao Liang does not arrive, after they settle the army, they will rush to Yanghu one after another to discuss the plan.

At this moment, when Cao Liang saw the summons, they didn't dare to slack off, and immediately handed over the affairs in their hands to the generals below, hurriedly got on the horse, didn't even wear clothes to cover the rain, and hurried to the infantry battalion.

Ma Long was the closest, naturally he was the first to arrive, and he didn't leave much, he almost followed Ma Long's ass to come in, Du Yu was the last to arrive because he was outside the West Gate, the farthest distance, and he received the news the latest, but they were all in a hurry, and they didn't let Cao Liang wait for a long time.

Cao Liang seemed to be very patient, and was not in a hurry to say what he thought, but calmly waited for them to come one by one, after Ma Long and Lianhong arrived, they saluted Cao Liang respectively, Cao Liang just smiled and asked him to sit down first, and wait until Du Yu arrived before everyone was ready to discuss the matter.

There is a huge sand table placed on several cases, which completely shows the geographical situation of Xindu City and the surrounding area.

Compared with the map, the sand table has a three-dimensional sense and can intuitively let people see the changes in the terrain, so it is used more in the military, but the sand table also has shortcomings, that is, it is only suitable for a relatively small area, and a larger area needs a map to display.

The sand table used by Yanghu is very exquisitely made, it is completely a reduced Xindu City in the same proportion, and the surrounding plains and rivers are clearly marked, including the deployment of troops on both sides, which are very detailed and comprehensive.

A good military map can provide accurate battlefield information and help commanders make correct strategic decisions, so this military sand table of Yanghu is particularly professional and has very little error.

However, Cao Liang only glanced at it and didn't look carefully, because his focus was not here, he already knew the situation in Xindu, and today he personally rushed to the front line, but there were other arrangements.

Cao Liang briefly inquired about the siege situation, Yanghu and the other four made a report, it can be seen that everyone is more frustrated, the siege war was carried out at the most critical juncture, and they only need to work harder, maybe they can take Xindu, but this sudden heavy rain has disrupted their attack, making the generals really a little unwilling.

Cao Liang smiled slightly and said, "So what do you think now?" ”

Zhan Hong shook his head and said, "What else can I think, I can only wait for this damn rain to stop and attack again!" ”

Cao Liang said: "The ants are attached to the siege of the city, the most inevitable is the casualties, the siege of the city for several days, our army has suffered thousands of casualties, if you really want to take the city of Xindu, I am afraid that the number of casualties will increase exponentially." This heavy rain has given us another opportunity, we don't have to work hard, we can also win Xindu! ”

In addition to Yanghu, Du Pre, Zhan Hong and Ma Long were all stunned, because their attack had to be stopped because of this heavy rain, after all, it was more difficult to attack in the rain, in addition to increasing casualties, it was impossible to achieve the desired results, and now Cao Liang said that this heavy rain was an opportunity to take Xindu, which was obviously unexpected by them.

Only Yanghu heard Cao Liang's statement of a god-given opportunity before, although Cao Liang did not explain further, but Yanghu had some calculations in his heart, and he seemed to think of something.

Cao Liang glanced at everyone's stunned expressions, and said with a light smile: "Then the military advisor will explain it to you." ”

Huan Fan nodded slightly, walked straight to the sand table, pointed to the sand table and said: "Everyone, please see, Xindu City is located in the plain, low-lying, with the Zhanghe River in the north and the Qinghe River in the south. Now it is the peach blossom flood season, the water level of the Qinghe River of the Zhanghe River has skyrocketed, and it coincides with this rainstorm, it is really the help of the sky, the lord has ordered the Xiaoqi battalion to rush to the upper reaches of the Zhanghe River, and the Yue Cavalry Battalion rushed to the upper reaches of the Qinghe River. Therefore, all infantry battalions must withdraw from their existing positions and move to the various heights by tomorrow evening, and at the same time prepare boats and rafts to take advantage of the flooding of Xindu to take Xindu in one fell swoop. ”

Only then did the generals suddenly realize that Cao Liang had a plan and a premeditated plan, taking advantage of the opportunity of the heavy rain and the river to swell, he was ready to launch a water attack, and with the help of the power of the flood, he could surrender without a fight.

There are countless water attack plans in history, just in the Three Kingdoms era, there have been many times, Cao Cao has decided to Yi, Si water flooded Xiapi, and captured Lu Bu alive. After digging the water of the Zhanghe River, it flooded Jizhou, which is the current Xindu City, which shows that Cao Liang's strategy has a precedent, and Xindu City is not the first time that it has been flooded.

Of course, the most prestigious in the Three Kingdoms era was Guan Yu's flooded Seventh Army, when Cao Jun's Seven-Way Army was under the command of Ban Pang De, galloping to the aid of Fancheng, but Guan Yu seized the opportunity to break the Han River to drown it, so he was captured in the ban, beheaded Pang De, broke the Seventh Army, and became famous all over the world, which also made Guan Yu's reputation reach its peak.

However, after Guan Yu flooded the Seventh Army, he was followed by the defeat of Maicheng and became the ghost of Sun Quan's knife, which is the later story.

Flooding Xindu, this suggestion was originally thought of by Cao Liang, of course Cao Cao was available when he broke Yuan Shao, why can't he use it now?

Now it is the peach blossom flood season, the Zhanghe River and the Qinghe River all originate from the Taihang Mountain, last winter it snowed heavily, now the ice and snow melt, the river floods, undoubtedly provides the conditions for the water attack plan.

Just when the Bingzhou army besieged Xindu, Cao Liang sent people to the upper reaches of the Zhanghe River and the Qinghe River to investigate, the water level of the two rivers soared, there is a risk of bursting the embankment, and now the Jizhou army is all cowering in the Xindu City, and the flood control of these rivers is naturally no one cares.

Cao Liang sent people to the upper reaches of the two rivers to repair the embankment, before the Bingzhou army withdrew, if there was a flood and burst the embankment, the first to suffer was not Xindu, but the Bingzhou army that was attacking the city, so it was completely necessary to repair the embankment.

However, in the process of repairing the embankment, Cao Liang has already come up with the idea of water attack, and now the state army adopts the method of attacking the city with ants, and the casualties are very large.

The only thing that worries Cao Liang is whether the water is enough, if it can't completely flood the Xindu City, then it will be in vain, and it will have an adverse impact on the subsequent siege.

Just when Cao Liang hesitated, God sent this timely rain.