Cao Jun set up camp on the edge of a canal where Anzhong was still a day's journey. Pen, fun, pavilion www. biquge。 info Zhang Xiu obviously got the spies in return, and he didn't dare to be too aggressive, but stopped ten miles away, and his only choice now was to set up camp, and then send a spy to inform Liu Biao.

The canal where Cao Jun camped was artificially built, called the Black Dragon Canal, Cao Pi knew about this canal, and he had taken an elective course called "Changes in the History of Ancient Agricultural Water Conservancy" when he was in college, which recorded this artificial canal that he sought to see in the Han Dynasty.

Here is the Central Plains rare sand ginger black soil belt, the canal because of the channel of the black soil reflection is black, like a winding black dragon, this channel is used to divert water again, the local people take the meaning of the black dragon to carry the rain Huitian, the canal is named the black dragon canal.

When camping, Guo Jia also informed Cao Pi that there were not only Heilong Canal near Anzhong, but also several weir slopes that stored water, such as Yuchipi, Huangchipi, and Niujiaopi. According to Guo Jia's estimate, it was the Marquis of Anzhong who built his own mausoleum in the past dynasties when he was famous for his teacher, so he built this kind of water conservancy to promote agriculture, after all, water conservancy is to benefit the people, and it can open up the leylines, which is the most perfect cover for the construction of the mausoleum.

At this time, the way the Cao army camped changed again, it was to place the camp of the regular soldiers in front of Zhang Xiu, and the camp of the people and the baggage was placed by the Black Dragon Canal, and the entire Cao Army camp formed a semicircle on the edge of the Black Dragon Canal.

After the camp was completed, Cao Cao took Cao Pi and Guo Jia and a group of generals to the center of the Minfu camp, at this time a two-meter-square hole had appeared in the Minfu camp, and five men in clothes were checking at the entrance of the cave.

Seeing Cao Cao coming, one of the shortest men stepped forward and said: "Sikong, this is not the entrance of the ancient tomb, but a culvert, connecting the four water sources of the Black Dragon Canal, Yuchipi, Huangchipi, and Niujiaopi, and built under the tomb. ”

There is no concept of feng shui yet, but there is a similar saying, in fact, it is the meaning of feng shui, Cao Pi does not know much about this, and now he can only listen to it.

"Will our army be able to pass through the ancient tomb from here? And then go to the place where they encamped in Anzhong? ”

"If there are water-crossing utensils, you can."

"How long does it take?"

"Five hundred people a day."

Guo Jia interjected on the side at this time: "Sikong, our army is camped here, it is already a Jedi, Liu Biao will arrive within two days, and Zhang Xiuke can show a corner situation, forcing our army to fight a decisive battle, although our army has 30,000 soldiers, but 60,000 people are negligent in the battle formation, and the two armies will be in trouble for life." ”

Cao Pi has been taught by Lejin, Cao Ren, and Cao Cao these days, and he already has a good understanding of the methods of warfare in the world, and many of the troops who claim to be hundreds of thousands of troops may not exceed 100,000, and most of them should be people who are responsible for transporting grain and camping.

If you want to give full play to the strongest combat effectiveness of the army, then you must separate the people from the regular soldiers, if they are mixed together, when the two armies face each other, the defenseless people are easy to have a nervous breakdown, and then a mutiny, maybe the regular army is fighting in front, and the people will flee from behind, and now the Cao army is camped on the edge of the Black Dragon Canal, unless Cao Cao immediately chooses to build a bridge and run away, otherwise when the confrontation, some of the people will swim across the canal to escape, but at least half of the people will run away from the front, At that time, Cao's army had to deal with the coalition forces of Zhang Xiu and Liu Biao in front, and had to deal with the collision and squeeze of the people in the back, and the result would be undoubted.

Minfu is not a soldier, and when he is unarmed and under siege, his first consideration is how to survive, rather than co-dying with his boss.

Therefore, Guo Jia pointed out the key to the problem in one sentence, in two days, only a thousand soldiers could be sent away from this waterway, and it was impossible to transport all the soldiers away, they had to face Zhang Xiu and Liu Biao's reinforcements, and at that time, how to solve the problem of the people's mutiny was the top priority.

Cao Cao smiled unhurriedly: "If you use the culvert to cross the baggage, how many days can you pass?" ”

The man in the cloak replied, "The baggage is a dead thing, and it is enough to use driftwood, so it only takes a hundred people to answer it in the tomb, and set up a water surround with huge logs in the culvert, so that the baggage can float on the culvert and not move into the tomb." From this moment on, all the baggage of our army can flow into the culvert overnight. ”

"That's it, let's get started now." After Cao Cao finished speaking, he ordered Cao Ren and the man in the cloth to direct the people to carry the baggage into the culvert. At the same time, he beckoned the generals to enter the big tent of the Chinese army to discuss matters, and Cao Pi went to another tent to rest.

After the discussion, Guo Jia came to inform Cao Pi that at the fourth watch tonight, the army set off and marched at full speed to Anzhong. At this time, Cao Pi already knew Cao Cao's intentions.

On the fourth watch of the night, the dawn of spring was the darkest, and Cao's army, which had no baggage, opened up and left all the utensils used for camping. Five hundred tigers and leopards rode in front, two thousand tiger guards in the middle, thirty thousand Cao troops behind, and sixty thousand people followed, just like that, they walked away with the faint starlight.

Starting at this time, even if Zhang Xiu was woken up by the spies in his sleep, plus the time of the whole army, he would be at least two hours behind Cao Cao, not to mention that Cao Jun has no baggage now, and under the full speed march, Zhang Xiu can only be farther behind.

As for Liu Biao, when Cao Cao set up camp and the Black Dragon Canal, he must have come out of the nest, and the opportunity to attack before and after is fleeting, not to mention that Cao Jun has a big tail and a big man, and it is impossible to run, but counting the time reported by Zhang Xiu's spies and the time of the whole army, now Liu Biao has only walked fifteen miles at most, because he is afraid that Cao Jun will launch a surprise attack with leisure, Liu Biao will not risk marching late at night, so at this moment, he should set up camp about fifteen miles away from Cao Jun, recuperate, and even get better with Zhang Xiu, As soon as the army arrives tomorrow, they will launch a surprise attack on Cao Cao.

But Liu Biao never expected that Cao Cao would hide his baggage through an ancient tomb culvert, and then travel lightly and open at dawn. At this time, even if Zhang Xiu wanted to inform Liu Biao, it was too late.

Zhang Xiu, who had completed the reorganization of the army in the back, raised his troops to pursue while taking a look at the camp of the Cao army, and found that all the baggage had been gone, leaving the tent, and then concluded that Cao Cao was leaving with the baggage, which made him miscalculate the marching time of the Cao army, and also missed the last good opportunity to flank the front and back.

When Jia Xu persuaded him to take only 1,000 Xiliang cavalry to pursue Cao Cao with all his might, Zhang Xiu said: "Cao thief with baggage forward, there must be elite soldiers behind the palace, both baggage, the march must be slow, and lead the foot cavalry to go together, while Cao thief and Liu Jingzhou are fighting, you can destroy Cao thief, and can hurt Liu Jingzhou's vitality, isn't it wonderful." ”

It was Zhang Xiu's mentality that made Cao Jun see Liu Biao's camp an hour earlier, because it was expected that Cao Cao would defend the Black Dragon Canal, and this camp did not have too many antlers and sentry towers to form a defensive line, for the heavily armed tiger and leopard cavalry and tiger guards, this kind of camp was fragile.

Cao Cao was not polite, and at the sound of an order, the tiger and leopard cavalry, the tiger guards, and the ordinary sergeants charged together, while the people fell back a hundred paces under the leadership of the three thousand sergeants led by Yu Ban, ready to harvest the fruits of success.

Cao Pi was by the forbidden side at this time, watching Cao Cao and his soldiers attack Liu Biao's camp in a moment.