Biography
Early life and intelligence
Xun You was born in 157 CE in Yingyin County, Yingchuan Commandery (present-day Xuchang, Henan). He came from the prestigious Yingchuan Xun clan. His grandfather Xun Tan served as Administrator of Guangling, and his father Xun Yi was a Provincial Clerk but died when Xun You was young. Xun You was raised by his uncle Xun Qu.
Even as a child, Xun You displayed remarkable intelligence and observation. When he was seven or eight years old, his uncle Xun Qu accidentally injured Xun You’s ear while drunk. Xun You, when playing outside, would always avoid Xun Qu so he would not see the injury. When Xun Qu later learned of this, he was amazed at Xun You’s early wisdom.
When Xun You was thirteen, his grandfather Xun Tan died. A former subordinate named Zhang Quan came forward asking to guard Xun Tan’s tomb. Xun You told his uncle: “This man’s expression is abnormal—I suspect he has done something treacherous!” Xun Qu questioned Zhang Quan that night, and indeed Zhang Quan had killed someone and was fleeing, hoping to hide by guarding the tomb. From then on, people viewed Xun You with special regard.
Service under He Jin and plot against Dong Zhuo
In 189 CE, Grand General He Jin came to power and summoned famous scholars from throughout the realm, including Xun You and more than twenty others. Xun You arrived in Luoyang and was appointed Gentleman of the Yellow Gate.
That year, Dong Zhuo seized power and moved the capital to Chang’an. Xun You plotted with Court Gentleman Zheng Tai, He Yong, Palace Attendant Zhong Ji, and Colonel of the Rapid Cavalry Wu Qiong to assassinate Dong Zhuo. They said: “Dong Zhuo is without principle, and all under heaven resent him. Though he has gathered many elite troops, he is actually just a brave warrior. If we assassinate Dong Zhuo to comfort the people, then occupy Mount Yao and Hangu Pass to assist the royal command and order the realm, this would be the action of Duke Huan of Qi and Duke Wen of Jin.”
Before the plot could be executed, it was discovered. He Yong and Xun You were arrested and imprisoned. He Yong, worried and fearful, committed suicide. Xun You, however, spoke and ate normally, showing no fear. Coincidentally, Dong Zhuo was killed soon after, and Xun You was released. He abandoned his office and left Luoyang.
Xun You considered Shu to be strategically secure with prosperous people and requested appointment as Administrator of Shu Commandery, but because the roads were too difficult, he stopped in Jing Province and remained there.
Joining Cao Cao
In 196 CE, Cao Cao welcomed Emperor Xian to Xuchang. Cao Cao had long heard of Xun You’s reputation and wrote to summon him: “Now the realm is in great chaos, and it is time for strategists to labour their minds. Yet you, sir, observe the changes from Shu and Han—is this not too conservative?”
Cao Cao appointed Xun You as Administrator of Runan and then Director of the Imperial Secretariat. When Cao Cao first met Xun You and spoke with him, he was greatly pleased. He said to Xun You’s cousin Xun Yu and Zhong Yao: “Gongda is no ordinary man. I can discuss great matters with him—how can I still worry about not obtaining the realm?”
From then on, Xun You became Cao Cao’s strategist.
Campaign against Zhang Xiu
In 198 CE, Xun You accompanied Cao Cao on campaign against Zhang Xiu. Xun You saw that the situation was unfavourable to Cao Cao and advised: “Zhang Xiu and Liu Biao rely on each other, thinking themselves strong. However, Zhang Xiu’s forces depend on Liu Biao for supplies. Over time, Liu Biao will be unable to sustain this and will certainly split with Zhang Xiu. We should delay our troops and wait for the change. If we attack urgently, Liu Biao will certainly fight desperately to rescue Zhang Xiu.”
Cao Cao did not listen and attacked Zhang Xiu. Liu Biao indeed sent troops to rescue, and Cao Cao’s army was defeated. Cao Cao said to Xun You: “I did not listen to your words, and this is the result.” He then set up an ambush and fought Zhang Xiu and Liu Biao’s combined forces again, achieving a great victory.
Capturing Lü Bu
That same year, Cao Cao campaigned against Lü Bu from Wan, reaching Xiapi. Lü Bu retreated and defended the city. Cao Cao attacked but could not take it. After continuous fighting, the soldiers were exhausted, and Cao Cao considered withdrawing.
Xun You and Guo Jia said: “Lü Bu is brave but without strategy. Now he has been defeated three times, and his sharpness is exhausted. The army takes the general as its head—when the head is weak, the army has no will to fight. Chen Gong has strategy but is slow by nature. Now Lü Bu’s morale has not yet recovered, and Chen Gong’s plans are not yet fixed. If we take advantage of this opportunity to press the attack urgently, we can defeat Lü Bu.”
Cao Cao then diverted the Yi and Si Rivers to flood the city. The city was breached, and Lü Bu was captured alive.
The Battle of Guandu
In 200 CE, the second month, Yuan Shao first sent his general Yan Liang to besiege Baima (present-day Hua County, Henan). In the fourth month, Cao Cao personally led troops north to rescue Baima.
As the army advanced, Xun You analysed that they could not directly confront an enemy far superior in strength. He proposed a strategy of feinting east while attacking west to rescue Baima. He reasoned that Yuan Shao had many troops, so they should try to divide his forces. He advised Cao Cao to lead troops first to Yanjin, pretending to cross the river to attack Yuan Shao’s rear, causing Yuan Shao to divide his forces westward. Then they could send light cavalry to attack the Yuan forces besieging Baima, catching them unprepared and certainly defeating Yan Liang.
Cao Cao followed this plan. Yuan Shao indeed divided his forces to Yanjin. Cao Cao took the opportunity to lead light cavalry to attack Baima. Yan Liang was unprepared and was killed by Guan Yu. Cao Cao lifted the siege of Baima.
Defeating Wen Chou
After lifting the siege of Baima, Cao Cao led six hundred cavalry escorting supplies and equipment westward along the river. Soon after setting out, they encountered five or six thousand of Yuan Shao’s pursuing troops. The generals, seeing they were outnumbered, were afraid and advised Cao Cao to retreat to the main camp.
Xun You knew the enemy’s weakness and said: “This is precisely the opportunity to destroy the enemy—why retreat?” Cao Cao and Xun You looked at each other and smiled, understanding each other’s thoughts. Cao Cao ordered the soldiers to remove their saddles and release their horses, abandoning the supplies to lure the Yuan army. When the Yuan troops approached and were scrambling for the supplies, Cao Cao suddenly ordered them to mount and launched a fierce attack. Liu Bei fled, Wen Chou was killed, and the Yuan army was defeated.
Strategies at Guandu
Cao Cao and Yuan Shao then formed a stalemate at Guandu. As both sides’ supplies ran low, Xun You advised Cao Cao: “Yuan Shao’s supply wagons will arrive within a day. The escorting general Han Meng is capable but overconfident—we can defeat him by attacking.”
Cao Cao asked: “Who can we send?” Xun You said: “Xu Huang.” Cao Cao sent Xu Huang and Shi Huan to intercept halfway, defeating Han Meng and burning the military supplies he was escorting.
When Xu You came to surrender and said that Yuan Shao had sent Chunyu Qiong and others with over ten thousand soldiers to escort grain, and that the generals were arrogant while the soldiers were lax, they could be intercepted. Most were suspicious, but only Xun You and Jia Xu urged Cao Cao to follow the plan. Cao Cao left Xun You and Cao Hong to guard the camp and personally led troops to attack, defeating the Yuan forces and killing Chunyu Qiong and others.
Yuan Shao’s generals Zhang He and Gao Lan burned their attack equipment and surrendered to Cao Cao. Yuan Shao had no choice but to abandon his army and flee north of the Yellow River. When Zhang He came to surrender, Cao Hong was suspicious and did not dare accept him. Xun You said to Cao Hong: “Zhang He’s plans were not used by Yuan Shao, and he came in anger—why do you suspect him?” Cao Hong then accepted Zhang He’s surrender.
Post-Guantu campaigns
In 202 CE, Xun You followed Cao Cao in attacking Yuan Tan and Yuan Shang at Liyang. In 203 CE, Cao Cao had just set out to campaign against Liu Biao when Yuan Tan and Yuan Shang contended for Ji Province. Yuan Tan sent Xin Pi to request surrender and ask for help. Cao Cao agreed and asked his generals. Most thought Liu Biao was strong and should be attacked first, while Yuan Tan and Yuan Shang were not worth worrying about.
Xun You said: “The realm is in great chaos, and Liu Biao sits guarding the lands between the Jiang and Han Rivers. It is clear he has no ambition to rule the realm. The Yuan family occupies four provinces with a hundred thousand armoured troops. Yuan Shao gained the people’s hearts through generosity. If his two sons could live in harmony and preserve their established achievements, then the realm’s disasters would not cease. Now the Yuan brothers are at odds, and the result will not be that both are preserved. If the two Yuans unite, their strength will be great, and then they will not be easy to attack. If we take advantage of their internal conflict to attack them, the realm will be pacified. This opportunity must not be lost!”
Cao Cao said: “Excellent.” He agreed to make peace with Yuan Tan and immediately sent troops to defeat Yuan Shang. Later, Yuan Tan rebelled, and Xun You followed Cao Cao in killing Yuan Tan at Nanpi.
After Ji Province was pacified, Cao Cao petitioned Emperor Xian: “Army Advisor Xun You, from the beginning of assisting your servant, has never failed to accompany any campaign. All victories over enemies have been due to Xun You’s strategies.” Xun You was enfeoffed as Marquis of Lingshu.
Later service and death
In 207 CE, Cao Cao ordered rewards based on merit, saying: “Those who are loyal, upright, and skilled at secret strategy, who pacify internal and external affairs for me—Wenruo is such, and Gongda is second to him.” Xun You’s fief was increased by four hundred households, making seven hundred in total, and he was promoted to Central Army Advisor.
As Central Army Advisor, Xun You no longer frequently accompanied campaigns but remained in the rear for Cao Cao, managing punishments.
In 213 CE, Xun You and others together urged Cao Cao to advance to Duke of Wei. That year, the state of Wei was established. In the eleventh month, Xun You became Director of the Imperial Secretariat.
In the seventh month of 214 CE, Xun You followed Cao Cao on campaign against Sun Quan. He died on the road. Cao Cao wept whenever he spoke of him.
Xun You had been deeply secretive and wise in defence. Since following Cao Cao on campaigns, he had often planned strategy in the tent, and few people knew what he said. Cao Cao often praised him: “Gongda appears foolish but is wise within, appears timid but is brave within, appears weak but is strong within. He does not boast of his strengths or exaggerate his achievements. His inner wisdom others can reach, but his outer foolishness others cannot reach. Even Yan Hui and Ning Wu could not surpass him.”
When Cao Pi was crown prince, Cao Cao told him: “Xun Gongda is a model for men. You should show him full respect.” Xun You once fell ill, and Cao Pi went to visit him, bowing alone at the foot of the bed. Such was the special respect he received.
Xun You was close friends with Zhong Yao. Zhong Yao said: “Every time I plan something, I think it over repeatedly and believe there is nothing to change. But when I consult Gongda, his reply always exceeds my expectations.”
Xun You had devised twelve secret strategies in total, but only Zhong Yao knew them. Zhong Yao was compiling them but died before completing the work, so later generations never learned them—the so-called “the world could not hear them all.”
In 244 CE, Cao Fang issued an edict to sacrifice Xun You in the temple of the Grand Ancestor (Cao Cao), and he was posthumously granted the title Marquis Jing.
Personality
Xun You was known for his deep secrecy, wisdom, and defensive thinking. He was described as appearing foolish on the outside but wise within, appearing timid but brave within, appearing weak but strong within. He did not boast of his achievements or exaggerate his contributions. Cao Cao praised him as surpassing even Yan Hui and Ning Wu in this regard.
He was extremely secretive about his strategies. Even his own family members did not know what he discussed with Cao Cao in their planning sessions. This secrecy contributed to the loss of his twelve secret strategies, which only Zhong Yao knew but died before compiling them completely.
Despite his strategic brilliance, Xun You was humble and respectful. He was deeply trusted by Cao Cao and highly respected by Cao Pi, who bowed to him at the foot of his bed when visiting him during illness.
Military achievements
Capturing Lü Bu
Xun You’s analysis that Lü Bu’s morale was exhausted after three defeats, combined with Chen Gong’s slow nature, enabled Cao Cao to press the attack and flood Xiapi, capturing Lü Bu alive.
Strategies at Guandu
Xun You’s feint strategy at Baima divided Yuan Shao’s forces and enabled the rescue of the city. His advice on using supplies as bait led to the defeat of Wen Chou. His recommendation to attack Han Meng’s supply convoy and his support for Xu You’s plan to raid Wuchao were crucial to the victory at Guandu.
Post-Guantu strategy
Xun You correctly identified that Yuan Tan and Yuan Shang’s conflict presented an opportunity that should not be missed, advising Cao Cao to attack them rather than Liu Biao, leading to the pacification of Hebei.
The twelve secret strategies
Xun You devised twelve secret strategies during his service to Cao Cao, but only Zhong Yao knew them all. Zhong Yao died before compiling them, so they were lost to history—a great loss to military strategy.
Relationships
With Cao Cao
Cao Cao greatly valued Xun You, calling him “no ordinary man” and saying that with Xun You he need not worry about obtaining the realm. Xun You accompanied Cao Cao on every campaign and provided crucial strategic advice. Cao Cao praised him as second only to Xun Yu in loyalty, uprightness, and secret strategy.
With Xun Yu
Xun You was Xun Yu’s nephew (though older than Xun Yu). Both served as Cao Cao’s chief strategists, with Xun Yu handling court affairs and Xun You accompanying campaigns. They worked together effectively, and Xun Yu recommended Xun You to Cao Cao.
With Zhong Yao
Xun You and Zhong Yao were close friends. Zhong Yao said that whenever he consulted Xun You, the advice always exceeded his expectations. Zhong Yao was the only person who knew all of Xun You’s twelve secret strategies, but he died before compiling them, causing them to be lost.
With Cao Pi
Cao Pi deeply respected Xun You. When Xun You was ill, Cao Pi visited him and bowed at the foot of his bed—an extraordinary gesture of respect. Cao Cao had instructed Cao Pi to treat Xun You as a model and show him full respect.
Anecdotes
The twelve secret strategies
Xun You devised twelve secret strategies during his service to Cao Cao, but he was so secretive that only Zhong Yao knew them all. Zhong Yao intended to compile them but died before completing the work. Later historians lamented this loss, as these strategies represented some of the finest military thinking of the era.
The child who saw through deception
When Xun You was thirteen, he detected that a man asking to guard his grandfather’s tomb was actually a fugitive murderer trying to hide. This early display of insight impressed his uncle and others.
Avoiding his uncle
When Xun You was seven or eight, his uncle accidentally injured his ear while drunk. Xun You, when playing outside, would always avoid his uncle so he would not see the injury, showing remarkable consideration and wisdom for his age.
Arranging his concubine’s remarriage
After Xun You’s death, his children were still young. His friend Zhong Yao helped manage the household and arranged for Xun You’s concubine A-Wu to remarry, fulfilling a joke he had made years earlier when a fortune-teller predicted Xun You would die young.
Achievements
- Plotted to assassinate Dong Zhuo (though the plot was discovered)
- Advised strategy that led to Lü Bu’s capture at Xiapi
- Devised feint strategy that enabled rescue of Baima and defeat of Yan Liang
- Advised use of supplies as bait to defeat Wen Chou
- Recommended attacking Han Meng’s supply convoy at Guandu
- Supported Xu You’s plan to raid Wuchao
- Advised Cao Hong to accept Zhang He’s surrender
- Correctly identified opportunity to attack Yuan Tan and Yuan Shang during their conflict
- Devised twelve secret strategies (lost to history)
- Served as Director of the Imperial Secretariat for Cao Wei
Behind the scenes
Historical sources
Xun You’s biography appears in Records of the Three Kingdoms by Chen Shou, where he is grouped with Xun Yu and Jia Xu. Chen Shou praised Xun You and Jia Xu as “nearly calculating without omission, adapting to circumstances—they are the equals of Zhang Liang and Chen Ping.”
The lost strategies
The fact that Xun You’s twelve secret strategies were known only to Zhong Yao, who died before compiling them, has been lamented by historians. Pei Songzhi noted that Zhong Yao lived sixteen years after Xun You’s death and could have compiled them, but he was over eighty and still claimed the work was incomplete, causing these strategies to be lost forever.
Comparison with Xun Yu
While Xun Yu served primarily in the court and recommended talent, Xun You accompanied Cao Cao on campaigns and provided tactical advice. Both were highly valued, with Cao Cao ranking Xun Yu first and Xun You second in importance.
Historical evaluations
Contemporary
Cao Cao praised Xun You extensively: “Gongda appears foolish but is wise within, appears timid but is brave within, appears weak but is strong within. He does not boast of his strengths or exaggerate his achievements. His inner wisdom others can reach, but his outer foolishness others cannot reach. Even Yan Hui and Ning Wu could not surpass him.”
He also said: “Gongda is no ordinary man. I can discuss great matters with him—how can I still worry about not obtaining the realm?”
Chen Qun said: “Xun Wenruo, Gongda, Xiuruo, Youruo, and Zhongyu—there are no equals in the present age.”
Zhong Yao said: “Every time I plan something, I think it over repeatedly and believe there is nothing to change. But when I consult Gongda, his reply always exceeds my expectations.”
Later historians
Chen Shou wrote: “Xun You and Jia Xu were nearly calculating without omission, adapting to circumstances—they are the equals of Zhang Liang and Chen Ping.”
Yuan Hong praised Xun You’s determination and strategic thinking, noting his role in preserving the state during turbulent times.
Sima Guang noted: “Xun You was deeply secretive and wise in defence. Since following Duke Cao on campaigns, he often planned strategy in the tent, and contemporaries and his own family members did not know what he said.”
Legacy
Xun You is remembered as one of Cao Cao’s greatest strategists, second only to Xun Yu in importance. His tactical brilliance was crucial to Cao Cao’s victories, particularly at Guandu. However, the loss of his twelve secret strategies represents a significant gap in our understanding of Three Kingdoms military thought.
His reputation for appearing foolish while being wise within has made him a symbol of strategic depth and hidden intelligence. His close relationship with Cao Cao and the respect shown to him by Cao Pi demonstrate his importance to the Cao Wei state.
In 244 CE, he was posthumously honoured with sacrifice in Cao Cao’s temple, reflecting his lasting importance to the Cao Wei regime.
Timeline
- 157 CE: Born in Yingyin County, Yingchuan Commandery
- c. 170 CE: Detected that Zhang Quan was a fugitive murderer trying to hide by guarding his grandfather’s tomb
- 189 CE: Appointed Gentleman of the Yellow Gate under He Jin; plotted to assassinate Dong Zhuo; plot discovered, imprisoned but released after Dong Zhuo’s death
- 189–196 CE: Remained in Jing Province, considered appointment as Administrator of Shu Commandery
- 196 CE: Summoned by Cao Cao; appointed Administrator of Runan, then Director of the Imperial Secretariat; became Cao Cao’s strategist
- 198 CE: Advised on campaign against Zhang Xiu; advised strategy that led to Lü Bu’s capture at Xiapi
- 200 CE: Devised feint strategy at Baima; advised defeat of Wen Chou; recommended attacking Han Meng’s supply convoy; supported Xu You’s plan to raid Wuchao
- 202 CE: Followed Cao Cao in attacking Yuan Tan and Yuan Shang at Liyang
- 203 CE: Advised attacking Yuan Tan and Yuan Shang during their conflict
- 204 CE: Enfeoffed as Marquis of Lingshu after pacification of Ji Province
- 207 CE: Promoted to Central Army Advisor; fief increased to seven hundred households
- 213 CE: Urged Cao Cao to become Duke of Wei; appointed Director of the Imperial Secretariat when Wei state was established
- 214 CE: Died on campaign against Sun Quan
- 244 CE: Posthumously honoured with sacrifice in Cao Cao’s temple
See also
- Cao Cao
- Xun Yu
- Guo Jia
- Battle of Guandu
- Yingchuan Xun clan
References
- Chen Shou. Records of the Three Kingdoms, Volume 10, Biography of Xun You.
- Pei Songzhi. Annotations to Records of the Three Kingdoms.
- Sima Guang. Zizhi Tongjian, various volumes.