After Yuan Shao took control of Jizhou, he soon faced a big problem, that is, his younger brother Yuan Shu had relied on Sun Jian to turn the war around, Sun Jian regrouped after a heavy defeat to Xu Rong, fought three battles and three victories, defeated Dong Zhuo's Xiliang army, drove Dong Zhuo back to Chang'an, and recovered the old capital Luoyang.

At this moment, Yuan Shu's army, led by Sun Jian, was already faintly about to enter Guanxi, recapture the Son of Heaven, eliminate Dong Zhuo, and restore the Han Dynasty.

According to common sense, Yuan Shao, as the leader of the anti-Dong coalition army at this time, should rejoice and cheer for the victory of the Kwantung Army, but it is a pity that Yuan Shao and Yuan Shu have always had a general relationship, not long ago Yuan Shu just threw Yuan Shao's face on the matter of another establishment, not to mention that Yuan Shao at this moment is no longer just the leader of the Shi clan, Yuan Shao has become an out-and-out prince, and the goal is to dominate the world.

So Yuan Shao can't tolerate Yuan Shu and Sun Jian to eliminate Dong Zhuo, once they solve Dong Zhuo and restore the Han family, what else will happen to Yuan Shao in the world?

And according to the plan in the "Jizhou Pair", "Yingda is in Xijing, Fuzong Temple is in Luoyi, and the world is ordered to seek the future" This is what Yuan Shao has to do, how can it be given to Yuan Shu!

Therefore, in order to prevent Yuan Shu and Sun Jian's further actions, Yuan Shao decisively dragged his younger brother back, he appointed Zhou Ang as the assassin of Yuzhou, and led the army to occupy Sun Jian's base Yangcheng, forcing Sun Jian to interrupt the possible further offensive against Dong Zhuo's Western Liang army group.

For this reason, Yuan Shu immediately broke with Yuan Shao, and the two brothers completely turned their faces. In order to deal with Yuan Shao, Yuan Shu roped in Gongsun Zhan, Tao Qian and other princes to form an alliance and join forces with Yuan Shao as the goal.

In history, the reason why Tao Qian and Yuan Shu, Gongsun Chan and others dealt with Yuan Shao together is not recorded, and it is speculated that Tao Qian is likely to have a personal grudge with Yuan Shao, or it may be that Tao Qian wanted to repay Gongsun Zhan.

But there are many reasons for Gongsun Chan to deal with Yuan Shao, not counting Yuan Shao's behavior as the leader of the alliance but dragging his younger brother back, just between Gongsun Chan and Yuan Shao, Yuan Shao had already played Gongsun Chan once when he captured Jizhou, and later in the process of Yuan Shu recapturing Yangcheng, Gongsun Chan's cousin Gongsun Yue was killed in battle for attacking Zhou Ang, the assassin of Yuzhou appointed by Yuan Shao.

So Gongsun Chan said to everyone: "My brother's death was caused by Yuan Shao. "Use this as an excuse to crusade against Yuan Shao. Yuan Shao was greatly frightened when he learned about it, and in order to alleviate the conflict, he handed over his Bohai County Taishou Seal to Gongsun Zhan's other cousin, Gongsun Fan, and also sent him to Nanpi, Bohai County, wanting to form an alliance and truce.

And Gongsun Zhan's crusade against Yuan Shao for revenge is only one of them, but his purpose is Jizhou in the final analysis, which has not changed since Yuan Shao lured him south, but he began to be used as a gun by Yuan Shao, but he didn't get anything, and later his cousin was killed by an arrow because of Yuan Shao's incident, Gongsun Zhan simply used this as an excuse to raise troops to seize Yuan Shao's Jizhou and eliminate a potential enemy of himself in advance.

Therefore, Gongsun Chan naturally chose to form an alliance with Yuan Shu to fight against Yuan Shao in the end.

After Yuan Shao seized Jizhou, he put forward his own "Jizhou pair", preparing to unify the four northern states based on Jizhou, but unfortunately others are not stupid.

Yuan Shao regarded Gongsun Zhan as a target that needed to be eliminated, and he was not a prey in the eyes of others. Yuan Shao was able to easily lure Gongsun Chan to go south to crusade against Han Fu, although his envoy was eloquent, but more importantly, Gongsun Chan also had a demand for Jizhou.

Gongsun Chan is powerful in Youzhou, with an elite of a hundred battles, but he also had to succumb to Liu Yu of Youzhou, at that time Liu Yu's reputation in Youzhou was much higher than that of Gongsun Zhan, although Gongsun Chan was not weak, but there was no good way to face Liu Yu.

What's more, the two are full of contradictions in policy, water and fire are intolerable, one mountain cannot tolerate two tigers, Youzhou was located in the north at that time, and the economy has always needed the support of the imperial court, which is not suitable as a foundation place, and what is even more tragic is that the administrative power of Youzhou is also in the hands of Liu Yu, so Gongsun Chan needs to open up a new territory.

Jizhou was one of the famous states at that time, with sufficient soldiers and abundant products. Therefore, after getting Yuan Shao's letter, Gongsun Zhan immediately agreed to attack Jizhou with his alliance and eliminate Han Fu, but he didn't expect Yuan Shao to be a tall man, but he did coolies in vain.

After Yuan Shao captured Jizhou from Han Fu, it did not mean that Gongsun Zhan gave up Jizhou. After Yuan Shao appointed Gongsun Fan as the Taishou of Bohai, it happened that the Qingzhou Yellow Turban Army attacked.

After the establishment of the anti-Dong coalition army, Qingzhou assassin Shi Jiaohe also raised troops to crusade against Dong Zhuo, and he was ready to join forces with other generals to march westward, but he did not leave enough military strength to protect the safety of the people of Qingzhou, making Qingzhou extremely empty. As a result, as soon as his army crossed the Yellow River, the Yellow Turban Army had already revived in Qingzhou, and Jiao He was forced to return to the army to suppress it.

Originally, the Qingzhou area had always been rich, the army was very well equipped, and the combat effectiveness was not bad, but Jiao He fled every time he fought, and never confronted the enemy head-on, resulting in the continuous expansion of the Yellow Turban Army's power in Qingzhou.

Jiao He believes in ghosts and gods, believes in divination very much, and comes to a hexagram first every time he fights. In addition, although he is good at high-minded talk, he has a low eye for government affairs, and the rewards and punishments are unknown. The result was a depressed state with yellow turban thieves wandering around and ruins everywhere. Soon, Jiao He fell ill and died, and Qingzhou became a borderless land.

Yuan Shao also put his hand into Qingzhou shortly after Jiao He's death and sent Zang Hong, a native of Guangling, to serve as the assassin of Qingzhou to appease the people.

In history, this group of Yellow Turban Army later entered the territory of Yanzhou, making a mess of Yanzhou, and Liu Dai, the assassin of Yanzhou, was finally killed for this, and later Cao Cao became the pastor of Yanzhou and incorporated them, which is also the origin of Cao Cao's "Qingzhou soldiers".

In order to eliminate this group of Yellow Turban troops and help Gongsun Fan guard the Bohai Sea, Gongsun Zhan waved his army south.

At that time, 300,000 yellow turbans in Qingzhou and Xuzhou entered the Bohai border and wanted to join the Montenegrin army. Gongsun Chan led 20,000 cavalry to meet the south of Dongguang, broke the yellow turban, and beheaded more than 30,000 people. The thieves abandoned their baggage carts and put on 10,000 vehicles, and fled across the Yellow River, Gongsun Chan took advantage of them to cross the river and pressed over, and the thieves were defeated again, killing tens of thousands of people, bleeding and staining the river red, capturing more than 70,000 people, and the armor and property of the vehicles were not clear, so Gongsun Chan's prestige was greatly shocked.

Gongsun Zhan suppressed the Yellow Turban Army in Qing and Xu Erzhou, and thus took over the good relationship with Xuzhou Thorn Shi Taoqian.

At that time, Qingzhou had no owner, and Yuan Shao had not yet gained a firm foothold in Jizhou, so Gongsun Zan took these two big states as his goal, and took advantage of the prosperity of the army to directly crusade against Yuan Shao and seize Jizhou. Seeing Gongsun Chan like this, Yuan Shao also gave up his delusions, so he mobilized troops from all over the country to prepare for a decisive battle with Gongsun Zhan.