In order to seize Jizhou and Qingzhou, Gongsun Zhan intensified the conflict with Yuan Shao, and consumed a lot of vital strength, and at the same time, Youzhou Mu Liu Yu was gradually unable to tolerate him.

Originally, Gongsun Chan had a very big contradiction with Liu Yu in terms of foreign policy, Liu Yu advocated and appeased Rong Di, but Gongsun Chan thought that the Hu people were difficult to control, and they should be used to crusade in the name of disobedience to the imperial court, and Liu Yu is now adding financial rewards, which will only make the barbarians despise the Han people even more, although Liu Yu can achieve a temporary reputation, but it cannot be used as a long-term solution.

In history, Liu Yu and Gongsun Zhan's views are reasonable, and it is difficult to say which one is right and which is wrong, but at that time, Gongsun Zhan had already had war experience with the Wuhuan people, and he was also brave and brave, actively fighting, and had some gains, but he did not completely prevent the Wuhuan southern invasion, and the enemy even invaded Xuzhou, the hinterland of the Central Plains, and later the imperial court transferred Liu Yu to Youzhou Mu, also out of fear of war.

And after Liu Yu became the pastor of Youzhou, he immediately subdued the foreign clan without spending a single soldier, and the traitors Zhang Ju and Zhang Chun fled without a fight, which can be said to be an obvious achievement, and the contrast with Gongsun Zhan's achievements is very obvious.

Therefore, combined with the reality of Youzhou at that time and Liu Yu's own huge prestige, Gongsun Zhan's claim was not very convincing, at least Gongsun Chan did not prove that his strategy was better than Liu Yu's approach.

Of course, if Gongsun Chan only had a conflict with Liu Yu on policy strategy, Liu Yu might not be able to tolerate Gongsun Chan, but in history, Gongsun Chan was just talking. As Liu Yu's subordinates, Gongsun Chan and Liu Yu's policy discord is forgotten, in order to prevent Liu Yu and the Hu people from uniting, he not only secretly killed the Hu people's envoys, but even directly robbed Liu Yu of the items rewarded to the nomads, this kind of thing is not once or twice, Gongsun Chan relied on his own troops to do nonsense caused Liu Yu to be greatly dissatisfied.

In the war between Gongsun Chan and Yuan Shao, Gongsun Chan was even more reckless in order to fight against Yuan Shao, at that time Gongsun Chan had lost to Yuan Shao several times, and Youzhou itself was not as strong as Jizhou, so Liu Yu was worried about his abuse of force in order to restrict Gongsun Zhan, and was afraid that he would not be able to control his development, so he began to reduce his supply and resolutely refused to allow him to send troops again.

In the several wars in which Gongsun Chan went south to crusade against Han Fu and Yuan Shao, there is no information showing that Gongsun Chan was allowed by Liu Yu, and according to Gongsun Chan's character and style, it is very likely that he did not go through Liu Yu.

But after all, Youzhou Mu is Liu Yu's, and Gongsun Zhan's supply is also controlled by Liu Yu, at that time, Yuan Shao and Han Fu supported Liu Yu as the emperor, and Liu Yu, as a traditional person, will not have a very good opinion of them, so it is also possible that Liu Yu acquiesced to Gongsun Zhan's early battle.

But no matter what, Gongsun Chan has gradually escaped Liu Yu's control. After Liu Yu reduced the supply of Gongsun Zhan, Gongsun Zhan was directly enraged, no longer obeyed Liu Yu's control, and even ordered to invade the people of Youzhou in order to collect grain and grass.

These things made Liu Yu determined to eradicate Gongsun Zhan, at that time Liu Yu was already preparing to secretly crusade against Gongsun Zhan, so he went to discuss with Dong Cao Peng Wei You, but was opposed by Wei You, Wei You said to Liu Yu: "If people today stretch their necks and regard you as hope, the military warriors can't do without." Gongsun Zhan's civil and military talents are enough to be used, although there are minor mistakes, they should be tolerated. ”

At the beginning, what Gongsun Chan did was not very excessive, under the persuasion of Wei You, Liu Yu did not send troops to crusade against Gongsun Zhan, but Liu Yu did not give up sanctioning Gongsun Zhan, so he reported to the court many times to tell Gongsun Chan about the crime of rape and plundering of the people, Gongsun Chan also reported Liu Yu on the table to deduct his money and grain, the two accused each other, slandered each other, and the recital of the two continued to gallop to the imperial court, but the imperial court was ultimately unable to deal with it. Soon after, Wei You also died, and the contradiction between Liu Yu and Gongsun Zhan deepened.

At that time, Gongsun Chan even built a high platform in Jicheng to guard against Liu Yu.

In the fourth year of Chuping (193), Liu Yu could no longer tolerate Gongsun Zhan, and the time had come. At that time, in order to compete with Yuan Shao for Qingzhou, Gongsun Chan invested a lot of combat power in Qingzhou, which caused Gongsun Zhan's troops in Youzhou to be not very strong, so Liu Yu decided to take this opportunity to eliminate Gongsun Zhan.

In the winter of that year, Liu Yu decided to lead a total of 100,000 garrisons to attack Gongsun Zhan. When he was about to set off, Cheng Xu, a person under Liu Yu's command who was engaged in acting as a county, took off his helmet and stepped forward to persuade Liu Yu and said: "Although Gongsun Chan is guilty, the crime is not clear. Ming Gong did not warn him first to make corrections, but used troops against each other, which is not conducive to the country. Besides, victory or defeat is unpredictable, it is better to station the army and show him force, Gongsun Chan will definitely repent and apologize, this is the so-called way to make people submit without a fight. Liu Yu thought that Cheng Xu was hindering the plan in the battle, so he killed him to show the public.

Before fighting Gongsun Zhan, Liu Yu warned the sergeant: "Don't hurt others, just kill a Bo Jue (Gongsun Zhan's character)." "The soldiers were also asked to protect the houses and prevent them from being burned.

At that time, there was a person named Gongsun Ji in a state, Gongsun Chan was very good to him because he had the same surname, Gongsun Ji was grateful to Gongsun Chan, and reported him overnight knowing Liu Yu's plan.

Gongsun Zhan's troops were scattered outside at that time, and in a panic, he was afraid that he would not be spared, so he dug up Dongcheng and planned to escape. But I didn't expect that Liu Yu's soldiers were not used to fighting, and because of Liu Yu's orders, they couldn't attack for a while.

Seeing this situation, Gongsun Zhan also calmed down, so he picked hundreds of warriors, took advantage of the wind to set fire, and rushed straight to kill, Liu Yu was defeated, and fled north with his subordinates to Juyong County. Gongsun Chan pursued and attacked the city, and the city fell in three days, and then he grabbed Liu Yu and his wife and children back to the thistle, and Liu Yu was defeated by Gongsun Chan in minutes.

Before Liu Yu crusaded against Gongsun Zhan, the time and place were favorable, and Liu Yu occupied the advantage of righteousness and strength in all aspects, but the final result ended in Liu Yu's defeat, why?

Is it because Liu Yu didn't listen to Cheng Xu's words? Or was the plan leaked ahead of time? Neither!

Ci is not in charge of the soldiers!

Liu Yu let his soldiers only kill Gongsun Zhan, minimize the killing, and do not let them destroy the houses, although they are dedicated to the people, but because of this, Liu Yujun can't show it, and the fight is tied, and Gongsun Zhan himself didn't report hope, ready to escape, but seeing Liu Yujun like this, Gongsun Zhan had a good military sense of smell, and then seized the opportunity to set fire to the city, and finally reversed Liu Yu.

After all, a war is a war, and you can't win it if you are too merciful.

After Gongsun Chan defeated Liu Yu, he immediately replaced Liu Yu as the new generation of the lord of Youzhou.