【From prosperity to decline】

Historically, Gongsun Chan was one of the targets that Yuan Shao had to fight to unify the north in the "Jizhou Pair", and the Yuan Shao group's offensive against Gongsun Chan never stopped, and after Gongsun Chan killed Liu Yu to control Youzhou, the situation in the north also changed dramatically.

Liu Yu has been accumulating grace in Youzhou for a long time, won the hearts of the people, according to the "Heroes" record, seeing that Liu Yu was going to be killed, the former Changshan Prime Minister Sun Jin, Peng Zhang Yi, Zhang Zan and others out of loyalty, they went together to save Liu Yu, they scolded Gongsun Zhan, and then died together.

And Tian Chou, as Liu Yu's old department, also returned to Youzhou immediately after learning that he was at war with Gongsun Zhan, but Liu Yu had already been killed when he returned. So he went to Liu Yu's grave to pay homage to him, sent a seal to commemorate it, and finally left crying. When Gongsun Chan found out, he was furious and reprimanded Tian Chou loudly, but instead he was taught a lesson by Tian Chou with a straight face, and he couldn't do it.

And after eliminating Liu Yu, who had suppressed him for five years, Gongsun Zhan got the Youzhou he dreamed of, and he began to become arrogant and arrogant.

At that time, Gongsun Chan relied on his own talents and power, did not cherish the people, remembered the mistakes of others and did not remember the benefits of others, and a little grudge would definitely take revenge, and if there were virtuous people in the state whose reputation surpassed his, he would definitely be killed with crimes. And those who are talented among the children of the gentry must be trapped in a poor place.

He himself often said: "Those who are officials are destined to enjoy wealth and nobility, and they do not need to thank others for their benefits." Most of the people he loves are ordinary people like vendors. Everywhere he went, he was bullied and raped, and the people resented him. When Gongsun Chan was managing Youzhou, the price of grain was high due to the early locust plague, so that there was a situation of cannibalism.

Therefore, after Gongsun Chan killed Liu Yu, he ostensibly got Youzhou, expanded his sphere of influence, and then reached the peak of his life's glory, at that time Gongsun Zhan's territory included Youzhou, Bohai County in Jizhou and part of Qingzhou, and the sphere of influence reached the maximum, but in fact, Gongsun Chan was already in danger.

First of all, within Youzhou, people do not recognize Gongsun Zhan, the rebel who killed Liu Yu, the original owner of Youzhou, Gongsun Chan is far from being able to compare with Liu Yu in terms of ability and prestige, and the hearts of the people of Youzhou are in the dead Liu Yu, Gongsun Chan only got the empty shell of Youzhou.

And Gongsun Chan was even worse at managing Youzhou, not only did he get into trouble with the upper-level scholars in Youzhou, but at the same time, he couldn't bring benefits to the people, but made a mess of Youzhou.

And externally, the barbarians in the north and Yuan Shao in the south will also become Gongsun Zhan's henchmen. Liu Yu has a lofty status among the ethnic minorities, and Gongsun Chan has a very high hatred with them, and Yuan Shao is Gongsun Chan's mortal enemy.

Gongsun Zhan's killing of Liu Yu was the culmination of his glory and the beginning of his demise.

【Defeat Gongsun】

Gongsun Chan was unrighteous as a subordinate, ruthless as a leader, and was finally abandoned by everyone, and a crusade against Gongsun Chan was set off from the inside out on the land of Youzhou, and Liu Yu's old ministry rose up for its revenge internally, and the armies of Karasuma (i.e., Wuheng), Xianbei and Yuan Shao also came to attack on several sides.

In that year, Gongsun Zhan captured Liu Yu and completely occupied the land of Youzhou, with greater ambitions. Previously, a nursery rhyme said: "Yan Nan, go to the north, the middle is just as big as a stone, only in this can escape the world." Gongsun Chan thought that he was talking about this place, and immediately moved here. Build a barracks, build dozens of buildings, Linyi River, and lead to Liaohai.

Liu Yu's subordinates Xian Yufu, Qi Zhou, and Xian Yuyin, the cavalry commander, jointly led the state army to find Gongsun Zhan to avenge Liu Yu. Because Yan Rou of Yan Kingdom has always been trustworthy, everyone recommended him as Karasuma Sima. Yan Rou recruited soldiers from Karasuma, Xianbei and other places, and obtained tens of thousands of Hu and Han soldiers. This team fought with Zou Dan, the Yuyang Taishou set up by Gongsun Zhan, in Lubei, and won a complete victory, beheading Zou Dan and obtaining more than 4,000 heads.

In Qingzhou, Tian Kai, the Qingzhou assassin appointed by Gongsun Zhan, was defeated by Yuan Shao's eldest son Yuan Tan, Qingzhou was taken away by him, and Tian Kai also fled back to Youzhou.

Then the king of Wuhuan Qiao felt Liu Yu's kindness, led more than 7,000 cavalry of his fellow clansmen and Xianbei people, and Xian Yufu went south to meet Liu Yu's son Liu He, and at the same time, Yuan Shao also sent his general Lu Yi and Liu Yu's son Liu He, and led troops to attack Gongsun Zhan with Xian Yufu. They combined 100,000 troops and attacked Gongsun Chan together.

When Shidai County, Guangyang, Shanggu, and Youbeiping each killed the officials appointed by Gongsun Zhan and united with the armies of Xian Yufu and Liu He, the entire Youzhou began to rebel against Liu Yu.

Some of Gongsun Zhan's subordinates also began to betray him, and one of the generals named Wangmen directly led more than 10,000 soldiers under Yuan Shao to attack Dongzhou County under Gongsun Zhan's command, and Tian Yu was appointed by Gongsun Chan as the commander of Dongzhou County after leaving Liu Bei and returning to the north.

Tian Yu was in danger, climbed the city wall and said loudly to the king's gate: "You were treated favorably by General Gongsun, but you left him, there must be a last resort; Now that you have come back as an enemy, you know that you are a troublemaker. Although people only have the intelligence to carry a bottle to fetch water, they also know how to protect their bottles. I have accepted the commission of General Gongsun, why don't you hurry up and attack? So the king withdrew, ashamed. Dongzhou County also became one of the few Youzhou counties that was eventually controlled by Gongsun Zhan.

In the second year of Xingping (195), Ko Yi led a large army to defeat Gongsun Zan in Baoqiu and beheaded more than 20,000 people. Gongsun Zhan's army was defeated one after another, so he retreated to Yijing to hold on. Gongsun Zhan dug dozens of trenches in Yijing City, piled up mounds in the moats, all five or six zhang high, and built houses on them; The mound of earth in the middle trench was the highest, ten feet long, and kept it for himself, and he stored three million hui of grain there. At the same time, he also cultivated grain and gradually became self-sufficient.

Gongsun Zhan's turtle tactics have achieved obvious results, and Koyi and Gongsun Chan have been holding each other for more than a year, and the military rations have been eaten, and there is no good way to take Gongsun Zhan's fortified city. At that time, Sergeant Yuan Shao was hungry and tired, and began to gradually withdraw from the army. Gongsun Zhan intercepted a force of thousands of men and horses, and all of them seized their vehicles and baggage, which dealt a certain blow to Yuan Shaojun.

In history, although Gongsun Zan successfully repelled Yuan Shaojun's attack by trapping and defending the fortified city, it was only a drop in the bucket, and it was no longer beneficial to the overall situation of Youzhou.

As for Gongsun Zhan, although he still thinks that he can drag Yuan Shao to death and usher in a turning point, in fact, there is not much hope.