What level of strategists did Cao Cao have under him?

There are indeed many Cao forces strategists, but not all of them serve Cao Gong! At that time, the emperor was in Cao, and naturally there were many people who had no historical concepts who wanted to restore the Eastern Han Dynasty. It can also be said that some of them were "spies" who wanted to murder Cao Cao. I think this is the reason why Cao Cao did not take long in each expedition and did not bring many advisers, because the instability of the inner dynasty was very fatal, and it was several of his backbones and Cao Pi who played a role in stabilizing the inner dynasty at that time.

Guo Jia, one of the core figures of Cao Cao's early military think tank, had an extraordinary strategic vision and a three-point eye for observation. Because of its excellent overall view, he often has incisive and original successful suggestions for the selection of operational objectives and the grasp of combat periods. In the process of Cao Cao's complete crushing of Yuan Shao, Lü Bu and several other powerful warlords and achieving hegemony in the north. Guo Jiada's love for the world, and Cao Cao's mutual appreciation have also been rumored to be good stories. Unfortunately, after the Northern Expedition to Karasuma to suppress Yuan Shiyu, he died of illness at the age of thirty-eight.

Xun Yu (荀彧) (yù), (163–212) was a native of Yingyin (颍川, in modern Xuchang, Henan). At the end of the Eastern Han Dynasty, Cao Cao's subordinates were courtiers, outstanding military experts and politicians. Guan zhi Han ShiZhong, Shou Shang Shu Ling, Yu Yu Jing Hou. Because of his appointment as Shang Shu Ling, he held him in the middle for decades, and posterity respectfully called him "Xun Lingjun". When Cao Cao attacked Tao Qian, Lü Bu attacked Yanzhou, and Xun Yu, who was in danger, went to The Thousands of Horses of Shi Guogong to retreat to Yu Prefecture and defended three cities with Cheng Yu. Soon after Lü Bu was defeated, Xun Yu persuaded Cao Cao to meet Emperor Xian of Han, so he was promoted to Shizhong (侍中) and Shang Shuling (尚書令).

Xun You; Xun You, Zi Gongda, Yingyang people of Yingchuan at the end of the Eastern Han Dynasty. He came from a family of scholars, was kind and upright, and was resourceful. Xun You lost his parents at an early age and grew up with his grandfather and uncle. He is stupid and cowardly on the outside, but witty and brave on the inside. After Cao Cao welcomed the emperor to build the capital Xuchang, he heard that Xun You was a very intelligent man, so he enlisted him as the Taishou of Runan, and later worshiped him as a military master. Xun You felt that Cao Cao was a person he could work with, and he was willing to use it for him. Cao Cao got him, and often happily praised Xun You, saying, "Gongda, not an ordinary person! I can discuss with him, what is there to worry about in the world?" This shows Cao Cao's praise and trust in him.

Cheng Yu (程昱); a famous vassal of the State of Wei during the Three Kingdoms period. His real name was Cheng Li, and he changed his name to Cheng Yu because he was holding the sun in Mount Taishan in his dream. He once led the people to fight against the Yellow Turban in Dong'a. Later from Cao Cao to Yanzhou, He was given the title of Zhang Ling. When Cao Cao invaded Xuzhou, Cheng Yu and Xun Yu stayed in the rear to block Lü Bu and Chen Gong's army, and held the three cities, and for their merits, they were awarded the title of Dongping Xiang and Tun Yu in Fan County. Yu Chang advised Cao Cao, and after Emperor Xian of Han made xuchang the capital, he made Cheng Yu the general of Shangshu, and later the general of Dongzhong Lang, leading Jiyin Taishou and overseeing the affairs of Yanzhou. Later Emperor Wen made Cheng Yu a lieutenant and was enfeoffed as the Marquis of An. Huang Chu died in the first year of the first year, and his life was eighty years old, and Cao Pi also wept for it, and posthumously gave the general che riding a horse, and was known as the Marquis of Su.

Liu Ye was seven years old when his mother died. On her deathbed, her mother said: "Your father's (Liu Pu's) servant has the intention of slandering people, and I am afraid that after I die, there will be chaos, and I hope that you and your brother (Liu Zhuo) will get rid of this person when they grow up." When Liu Ye was thirteen years old, he killed his father's favored attendant according to his mother's will, and then frankly asked his father for guilt. Liu Pu was originally furious, but after knowing Liu Ye's motives, he also admired him very much and did not be harsh. Ru Nan Xu Shao was good at observing people, and at that time Yang Zhou took refuge, saying that Liu Ye had the talent of Zuo Shi.

Xia Zhicai (戏志才; play Zhicai, or Zhicai as a character, name unknown, was a native of Yingchuan Commandery (颍川郡, in modern Yuzhou, Henan) in the Eastern Han Dynasty. He was recommended by Xun Yu to become Cao Cao's counselor, but unfortunately died early, leaving no detailed records. After his death, Cao Cao asked Xun Yu who could replace him, so Xun Yu recommended Guo Jia. It is not mentioned in the Romance of the Three Kingdoms, but is slightly recorded in Chen Shou's Romance of the Three Kingdoms. "Yuyan strategist, into the drama of Zhicai." Zhi Cai pawn, and then into Guo Jia. "Romance of the Three Kingdoms, Wei Shu, Biography of Xun Yu"