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Zhang Liao crossed the Quqiu Mountain to catch the tail of Cao's army for a variety of purposes, and most of the troops were full of vigilance ahead and neglected the road they had walked when they came, especially a road like the Liangshan North Road, which runs from east to west. This is of course the biggest reason, but more importantly, Zhang Liao wants to rob Cao Jun's things.

There is a cloud in the art of war: the wise general eats the enemy, eats the enemy for one minute, and serves me for twenty minutes; Avoid one stone, when I twenty stones.

As the saying goes, three husbands and one soldier means that one soldier needs three men to transport supplies for him. Although the Yan clan had the advantage of large ships in the Yellow River Valley, from the distant Youzhou to Yanzhou, this road of transporting baggage was really costing countless grains and grass, and any Yan generals who had the advantage would think about how to eat the enemy's grain and reduce the burden of their own baggage behind. And for Zhang Liao, this question cannot wait for a moment...... He ran out of food.

Just like Chen Gong said, it is a risk to give up the ambush in the northwest of Liangshan and take a long detour, hoping that the latter will come first. There are only a few baggage discarded on the northern road, because since the supply of the river swelled and cut off, Zhang Liaobu has been facing the dilemma of lack of grain and grass, and every day there will be less grain and grass. When he met Xiahou Yuan in Liangshan North Road, Zhang Liaobu was actually only enough to break through to Ludi, and as a result, he left a few more in order to travel lightly, and only five days of grain and grass remained.

The greatest significance of this long-distance attack to Zhang Liao was to attack Cao's army behind the baggage, even if it could not defeat Xiahou Yuan's troops, it didn't matter, as long as he could grab his grain and grass, the battle would be won.

Because there is not much grain and grass left in Dongjun, the grain and grass in the urban and rural areas of various counties have been plundered by Yan Rou's department some time ago. Xiahou Yuan, who had lost his grain and grass, couldn't hold on for three days in the northern part of Dongjun, so he could only turn back!

When Zhang Liao walked out of Quqiu Mountain, Bei Yan had already led the cavalry to wait day and night at Donggukou in the north of Liangshan Road, and in Zhang Liao's eyes, Bei Yan was a very valuable subordinate military attaché...... For he led the cavalry and horses to eat in the wilderness, and not only saved a day's grain and grass, but also raised from the countryside for five thousand soldiers and horses to feed for a day.

As a general, you don't know how to attack like fire, but you can't take care of the food, clothing, housing and transportation of the soldiers under your command. Leading troops to fight, can do these tedious 'little things' and be meticulous, then he will not be a mediocre person.

There are too many generals who can fight, but the generals who can't feed their soldiers, even if they can fight well, will always inevitably lose in the end.

Zhang Liao took a step back at the foot of Liangshan Mountain and withdrew from the sea and sky; Xiahou Yuan, who had won a small victory at the beginning, stopped on the Liangshan Road, but fell into a dilemma. Xiahou Yuan is not like Zhang Liao, a battle buried ninety percent of the scouts, and the leader led the way to Chen Gong, a guide who acted as a local. But it was precisely because of the scouts that Xiahou Yuan did not dare to continue to go west.

After realizing that Zhang Liao was difficult to deal with, Xiahou Yuan raised Zhang Liao a lot higher in his heart, although Zhang Liao chose to retreat before, but the shock to Xiahou Yuan was no less than being defeated...... This kind of deterrence came from feeling that his mind was not enough, and he was completely surrounded by Zhang Liao, so he passively made Xiahou Yuan want not to follow Zhang Liao's ideas.

His scouts were chased and strangled by the Wuhuan cavalry when they went out of the valley, whether they were riding horses and archery or escaping, the scouts trained by the Yanzhou army were not as good as these Hu riders who grew up in northern Xinjiang, even if they were lucky enough to cross the blockade and arrive at the scouts in Yanggu, they could not let themselves return to Liangshan North Road alive, so Xiahou Yuan could only know that the enemy army appeared in the valley at the end of the mountain road, but there was no way to know more about the situation.

Xiahou Yuan thought that Zhang Liao was calculating him.

Yu Ban didn't think so, and argued with reason: "General Xiahou, Zhang Liao is cunning and brave, and he is familiar with military strategy. It is said in the book of war that when the enemy retreats, we must be careful of the enemy's attack, and the more fanfare the enemy's attack, the more we must be careful about whether they want to flee or not. Now that Yanggu's Hu cavalry is blocking the road but not daring to attack, I think Zhang Liao wants to escape! ”

But Xiahou Yuan couldn't make up his mind, and said: "Some time ago, when Zhang Liao retreated, I thought he wanted to attack, but he didn't attack; Now that he is on guard at Taniguchi, I'm afraid it's really a defense. ”

When the mediocre and the mediocre are opposed, according to the art of war, usually whoever knows how to use soldiers better will be victorious; And the smart man plays against the mediocre, and it is often the smart man who wins; But when a smart person plays against a smart person, there are many things to consider, and you can no longer simply rely on the art of war, but guess the opponent's virtual reality and use your own virtual reality to match, in order to barely achieve the goal of victory.

Xiahou Yuan never thought that Zhang Liao would be a mediocre person who didn't know how to use soldiers, so there was only one reason for this - Zhang Liao calculated him a step.

"Instead of making a move, it is better to divide the troops." Yu Ban was reluctant to wait for the rabbit like this, and hugged his fists and said: "The general is good at marching, it is better for his subordinates to lead the Taishan soldiers first to find out the reality of the enemy army." If Yang Valley is just Zhang Wenyuan's suspicious array, his subordinates take advantage of the situation to seize the city and deploy it to the whole Cao Gong; Even if the enemy army is heavily prepared, with the ability of a general, it can be supported in time and will not be defeated. ”

Xiahou Yuan finally agreed to Yu Ban's battle strategy, first taking the Taishan army as the front, and cautiously marching all the way to Yanggu. Xiahou Yuan's headquarters was slightly postponed with a baggage. In this way, even if the battle ahead is anxious, it will not hurt the baggage...... In fact, the situation they faced was not much different from that of Zhang Liaobu, and they would lose a day of grain and grass in the same day, after all, the army could not transport grain and grass from Liqiu to Liangshan North Road.

It is precisely because of this that Xiahou Yuan feels anxious, if it is blocked in these few days, the combat power of the soldiers will be lower and lower, and then he can only wait for Cao Cao's main force to attack Fan County from Liqiu and then kill the Xiangyang Valley army. Although this is the safest tactic, it is not possible to expect Cao Cao to kill from Xiaqiu to Yanggu. Now he sent out to inform Cao Cao whether the herald cavalry had arrived at Xiaqiu or not, if Cao Cao sent troops to Yanggu, it would be even slower!

In this way, Yu Ban led 5,000 Taishan soldiers all the way to the west, and then detoured to the north to go straight to Yanggu, and fought with Yan Rou's subordinates in less than half a day, the number of soldiers and horses on both sides was similar, Yan Rou's back to the city was sufficient, relying on the horse fast soldiers to take a lot of advantage, but the battle experience was less, but forgot to blockade the Cao army scouts, and the situation in Yanggu was almost separated by Yu Ban in half an hour.

Xiahou Yuan, thirty miles behind, received an urgent report from Yu Ban at night, "There is no trace of Zhang Liao in Yanggu, there are only thousands of Hu cavalry, please General Xiahou come to help quickly and work together to defeat the enemy!" ”

This made Xiahou Yuan lose the slightest scruples, and immediately put down his baggage and led the troops westward!