Liangzhou rebelled, and the imperial court requisitioned 3,000 elite cavalry from Youzhou, and gave Gongsun Zhan the commander of the 3,000 cavalry. When Gongsun Zan led the army before he reached Jizhong, Zhang Ju and Zhang Chun, who were from Yuyang, gathered the Wuhuan people to raise troops to rebel, and colluded with Qiu Liju, the lord of Wuhuan Liaoxi, to sack Youzhou.

Soon, Gongsun Zhan received an order from the general of Zhengbei, ordering him to lead his troops to rush outside the pass to resist the Wuhuan people entering the pass, and resolutely not let Qiu Liju lead the Wuhuan people into the pass.

Gongsun Zhan is a noble child, but because of his mother's humble background, he can only serve as a scholar. Because of his beauty, loud voice and intelligence, he was appreciated by Taishou and was invited to be his son-in-law. With the help of his father-in-law, he worked with Liu Bei and Liu Deran to study with Lu Zhi. Later, he was appointed as the imperial car under Liu Jun. When Liu Taishou broke the law and was sent to Rinan, he dared to violate the law and disguise himself as a soldier to escort him along the way, and Liu Taishou was pardoned on the way. After Gongsun Zhan returned, he was promoted to filial piety and honesty because of his virtue, and he was appointed as the governor of Liaodong.

Once, Gongsun Chan followed dozens of cavalry out to patrol the Guansai, and when he saw hundreds of Xianbei cavalry, Gongsun Chan retreated to the empty pavilion and said to the entourage: "If you don't take the initiative to attack, you will be killed." So he led the team to rush into the Xianbei team with a spear in hand, killing and wounding dozens of people, although fortunately he died, he also lost more than half. Xianbei people take this as a warning, and they no longer dare to easily cross the barrier. Gongsun Zhan was promoted to the county magistrate of Zhuo County.

Whether to go to Liangzhou to quell the rebellion or to quell the rebellion in Youzhou itself, Gongsun Zhan felt that it didn't matter. As a petty official in Youzhou, of course, he couldn't ignore the orders of the general of Zhengbei, besides, it was better to stay in Youzhou to quell the rebellion than to have an advantage in Liangzhou, so Gongsun Zhan decided to carry out the order of the general of Zhengbei and led three thousand iron cavalry out of the pass to meet the enemy.

The three thousand iron cavalry packed up and went straight to the outside of the pass, Gongsun Chan is also a general who knows the soldiers, and chose a Dangchong main road in the north of the mountain that has not yet entered the pass, and then the northeast is the vast wilderness, Gongsun Chan ordered the three thousand iron cavalry to be stationed in a high place to hide.

This is a relatively gentle slope facing the northeast direction, which is very conducive to the cavalry short-distance impact, and the front of the gentle slope is the necessary place for the Wuhuan cavalry to enter the Liaoxi region, once the Wuhuan iron cavalry passes here, the three thousand iron cavalry led by Gongsun Chan launched a surprise attack, the lethality is bound to be great, and it can even destroy the enemy army in one fell swoop. After setting up the cavalry sentry, Gongsun Zan led the cavalry to turn around the mountain col and camp to rest.

It is said that Chen Zhi led 10,000 troops to secretly sneak to the junction of Zhuoxian and Guangyang, and the military advisor was accompanied by Fu Zhi. This is the fastest way from Zhongshan to Yuyang, the north mountain is high and dense and dense for Tibetan soldiers, there are several small slopes in the south that are not very high, some people and horses are barely ambushed, once Zhang Chun goes to Yuyang and Zhang Ju to meet him, he will be led to pass by here, and then the north and south ambush troops will definitely kill him by surprise.

The choice of this location and strategy was determined by Zhao Yun, Fu Zhu and Chen Zhi on the sand table made by the lord Liu Zhuo, and the combat effectiveness of the soldiers led by Chen Zhi was not very good, although the results of the training were very good, most of them were new recruits and had not yet passed the test of war. If it is to confront Zhang Chun's rebels head-on, if it is rushed by the Wuhuan cavalry, it may become a rout, and if this result really occurs, it will be terrible, and it will directly affect the entire battle situation in Youzhou.

At that time, when I saw the sand table displayed by the lord Liu Zhuo, both the ministers and the generals present were impressed by the wisdom of the lord, which can be described as ingenious! This sand table was built by Liu Zhuo in the two years since he came to the end of the Han Dynasty, and a large number of people were arranged to run all over Youzhou, and it took huge financial resources to complete it. Now this group of people has gone to explore outside Youzhou to prepare for the next war in advance.

This is the era of cold weapons, which determines the victory or defeat of the war, first, the force value of the generals and soldiers under his command; Second, it depends on how many soldiers can be raised by one's own financial resources and what kind of weapons and equipment they are equipped with; the third is to look at the ability of his strategists to strategize; The fourth is how to make use of the right time, place and people.

Think about it, how many war cases in the Three Kingdoms era were precedents that used time and place to determine the outcome of a war? Therefore, it is too important to grasp the precise geographical environment, otherwise, Liu Zhuo will not warn his subordinates to keep it secret. Hehe, I can have a killing weapon, but I must not let my enemies know about it.

The army led by Chen Zhi has been waiting here for two days, and they are hiding in the mountains and forests around the clock, and the waiting is very boring. The horses had already been sent out in batches, and no enemy situation had been found within fifty miles, and some of the small leaders seemed to have some doubts about whether the enemy troops would be able to pass through this road.

"Captain, if the rebels don't pass through here, won't we be in vain?"

"This is the closest road to Yuyang, and it is also our first choice, we are just waiting for the rabbit. If there is a real error, there is no way for the enemy to change the route from here to Yuyang, so we have no choice but to change the ambush battle to a frontal battle, and then the casualties of our army will inevitably increase greatly. ”

"Well, Lieutenant Du is right, the ambush war will indeed reduce casualties for our army, and besides, these recruits will definitely not be very strong in combat effectiveness when they fight for the first time. It's great to have an ambush at this location, and it's a pity if the enemy forces change direction. ”

"Leave it to fate, it's best for the enemy to pass through here, if you don't pass through here, the enemy will not change and I will not change, and the enemy will change and I will change."

It just so happened that Fu Zhu came over to hear their conversation, and then the topic said: "Hehe, don't worry, Zhang Ju, who is in a hurry to meet Yuyang, will definitely choose the nearest route to advance, so we just have to wait patiently here." ”

"Hehe, the military advisor is reasonable, let's be calm for a while."

As soon as he finished speaking, a fast horse on the mountain road in the distance turned into the mountain pass, and the spies who were sent out may have returned.

"Report, Du Wei, the enemy army led by the rebel Zhang Chun has lived here for nearly fifty miles, and the rebels have burned and plundered all the way, and coerced the Wuhuan people, at this time, the rebel army has increased from 2,000 men and horses to 5,000 people, of which there are about 2,000 cavalry."

"Okay, probe and report again, pay attention to concealment and don't let the enemy find out."

"No, my subordinates are honoring the order."

After the horse left, Chen Zhi and Fu Zhu looked at each other, this Zhang Chun is too good to be organized, it has only been a few days to increase from 2,000 to 5,000 people, according to this speed of army expansion, it must not be expanded to 10,000 horses in Yuyang? It seems that it is timely to cut off Zhang Chun here and eliminate this rebel army.

Another cavalry came in at the pass, and news of the second group of spies came back.

"Report, Captain, the rebel Zhang Chun has been living here for forty miles."

"Probe and report again, pay attention to concealment."

"No, my subordinates obey."

After the spies left, both Chen Zhi and Fu Zhi breathed a sigh of relief, and it was not in vain to choose the right place for ambush here. The two of them packed up and prepared to deploy their forces and fight an ambush battle.