Cao Cao’s defeat of the Yuan family ends its rule in the north and makes the family’s internal succession struggle a decisive opening for his expansion. After the death of Yuan Shao, the rivalry between Yuan Tan and Yuan Shang weakens their ability to resist Cao Cao: alliances shift, cities fall, and the survivors are driven from their territory. The campaign concludes when Yuan Shang and Yuan Xi, having fled to Liaodong, are killed by its prefect, leaving Cao Cao free to turn his attention south.

Succession and Division

Yuan Shao’s death leaves his household divided between his sons. His widow has Yuan Shang installed as ruler, although Yuan Tan, the elder brother, resents being passed over. Yuan Shang does little to help Yuan Tan when he asks for reinforcements against Cao Cao; the small force sent is quickly defeated. His calculation is that Cao Cao will remove Yuan Tan for him, a policy that makes the family’s conflict an opportunity for its enemy.

In early 203, Cao Cao attacks again but cannot take Jizhou, and withdraws frustrated. His adviser Guo Jia sees that the brothers’ resentment can be turned into a strategy: if Yuan Tan and Yuan Shang openly fall out, Cao Cao can exploit the division. Yuan Tan, already aggrieved by his father’s choice of successor, is readily drawn into a conspiracy with Cao Cao.

Yuan Tan seeks advice from Guo Tu, who recommends inviting Yuan Shang to a banquet and attacking him there. Others argue against breaking the family’s unity, comparing brothers to a body’s two arms. But when Yuan Shang arrives at the banquet with fifty thousand men, Yuan Tan realizes his plan has been discovered. He rides out against his brother, loses, and flees to Pingyuan. A second attempt to fight Yuan Shang also ends in defeat and another retreat to Pingyuan. At Guo Tu’s urging, Yuan Tan then formally asks Cao Cao for help.

Cao Cao Turns Rivalry into Conquest

Cao Cao accepts Yuan Tan’s appeal because he judges the north ready to be conquered: people resent Yuan rule, the ruling family is divided, and, unlike in the Jingzhou region, the dynasty has little local support. When Cao Cao advances, Yuan Shang withdraws from the siege of Pingyuan, and Yuan Tan pursues him, attacking from behind. Yet the alliance is unstable from the start. Cao Cao and Yuan Tan plot against each other even as the struggle for the north continues between Cao Cao and Yuan Shang.

The fighting swings back and forth. Cities fall and armies are routed, but Cao Cao eventually stands again before the closed gates of Jizhou. This time he diverts the River Zhang and floods the city. He orders that members of the Yuan clan are not to be harmed; Jizhou falls. The campaign has converted a quarrel over succession into control of the family’s principal stronghold.

Yuan Tan proves as unreliable an ally to Cao Cao as he had been a brother to Yuan Shang. He rallies men who had served Yuan Shang and prepares to fight Cao Cao. Yuan Shang, disheartened by his failure, takes refuge with their other brother, Yuan Xi. Under pressure, Yuan Tan seeks an alliance with Liu Biao, but Liu Biao has little desire to support a collapsing family against Cao Cao’s rising power. At Xuande’s suggestion, Liu Biao adopts Cao Cao’s own divide-and-rule method, using an exchange of false letters to encourage Yuan Tan and Yuan Shang to reconcile and persuade each that he needs the other against Cao Cao. Cao Cao interprets this as Yuan Tan’s betrayal and besieges him at Nanpi.

The Fall of Nanpi and Yuan Tan

As Cao Cao closes in on Nanpi, Guo Tu proposes a desperate escape: force the civilian population out and ride through them. The attempt fails. Cao Hong, one of Cao Cao’s cousins, kills Yuan Tan, and Guo Tu is also found and killed.

After Nanpi falls, Cao Cao has Yuan Tan’s head displayed and orders that no one mourn him. One man nevertheless pays his respects. Arrested for disobeying the order, he explains that he had served Yuan Tan when Yuan Tan governed Qingzhou, and had left after openly criticizing his rule. He still believes that loyalty requires him to honor his former lord. Although Cao Cao’s command makes mourning punishable by death, he pardons the man, moved by his loyalty and sense of honor, and gives him a position in his new administration. The episode places the ruler’s demand for submission beside his capacity to recognize and reward a quality he values, even when it is directed toward his defeated rival.

The Last Yuan Brothers and the End of Their Rule

With Yuan Tan dead, Cao Cao pursues Yuan Shang and Yuan Xi. The brothers escape into the desert, and Cao Cao continues after them despite the barren terrain and the danger posed by hostile local tribes. The pursuit becomes harder still when winter sets in while fighting continues in the region.

The brothers flee farther and seek protection from the prefect of Liaodong. Fearful of making an enemy of Cao Cao, the prefect has them killed and sends their heads to him. The Yuan family’s rule ends with their deaths. Having conquered the north, Cao Cao can now begin planning an assault on the south.

Significance

The campaign’s decisive instrument is not simply battlefield force but the ability to use the Yuan brothers’ rivalry. Cao Cao’s first attack on Jizhou fails; Guo Jia’s proposal to deepen the existing division produces an opening, and the brothers’ repeated struggles leave them unable to unite against him. Even Yuan Tan’s appeal for help becomes a route to conquest, because Cao Cao can turn an alliance into an advance on the northern lands.

The conclusion also links territorial victory to a change in political scale. While the brothers contend for succession and then seek refuge beyond their former domain, Cao Cao captures Jizhou, takes Nanpi, and extends his pursuit to Liaodong. The final account of the Yuan family’s extinction marks more than the end of a household struggle: it removes the obstacle that had occupied Cao Cao in the north and prepares the next stage of his expansion.