* Cao Chun, general under Cao Cao ( b. 170 )

The figure-eight knot is also the hyperbolic knot whose complement has the smallest possible volume, 2. 02988 ... according to the work of Chun Cao and Robert Meyerhoff.

* Chun Cao and Robert Meyerhoff, The orientable cusped hyperbolic 3-manifolds of minimum volume, Inventiones Mathematicae, 146 ( 2001 ), no.

Liu Bei's two daughters were also captured by Cao Chun in the battle.

** Cao Chun, younger brother, served Cao Cao

The earliest commanders of this elite unit were all Cao Cao's clansmen ( Cao Xiu, Cao Zhen, Cao Chun ).

Cao Chun ( died 210 ) was a cavalry general serving under the warlord Cao Cao during the late Han Dynasty period of Chinese history.

Cao Chun was a younger brother of Cao Ren.

When Cao Chun was thirteen, their father died and the brothers took over the family estates and several hundred servants in their employ, whom Cao Chun managed well.

Being well-learned himself, Cao Chun also befriended scholars, who flocked to him.

* Cao Zhi, Chinese poet, also younger brother of Cao Pi and son of the powerful warlord Cao Cao.

Thiệu was part of a group of younger officers called the Young Turks — the most prominent apart from himself included commander of the Vietnam Air Force, Air Marshal Nguyễn Cao Kỳ, commander of I Corps General Nguyễn Chánh Thi and Admiral Chung Tấn Cang, the head of the Republic of Vietnam Navy.

He was said to be the uncle of the Emperor of the Song Dynasty, being the younger brother of Empress Dowager Cao ( 曹太后 cáo tàihòu ).

Císhèngguāngxiàn Empress did have a younger brother named Cao Yi in historical record.

Cao Guojiu's younger brother Cao Jingzhi ( 曹景植 cáo jǐng zhí ) was a bully, but no one dared to prosecute him because of his powerful connections, not even after he killed a person.

Cao Cao greatly favored Cao Zhi, a younger son of his also by Lady Bian, who was known for his literary talents.

Cao Pi's younger brother, Cao Xiong, was also said to have committed suicide out of fears for his brother.

** Ma Xiu, younger brother, executed on Cao Cao's orders after Ma Chao started a rebellion

** Ma Tie, younger brother, executed on Cao Cao's orders after Ma Chao started a rebellion

Exploiting the complicated relationship among the Cao Cao's sons, especially Cao Pi and Cao Zhi, Luo Guanzhong was able to create a palace scenario where the elder brother, having succeeded his father, tried to do away with his younger brother.

When Empress Bian, their common birth mother, heard of this, she went to Cao Pi and pleaded for the life of her younger son.

Liu Biao died in 208 and his younger son Liu Cong succeeded him and surrendered to Cao Cao without informing Liu Bei.

In 208, Liu Biao died and was succeeded by his younger son, Liu Cong, who surrendered Jing Province to Cao Cao.

Nevertheless, Liu Cong, in fear of having to fight Cao Cao and his brother on two fronts, surrendered to Cao Cao against the advice of Liu Biao's key ally Liu Bei.

Royal Uncle Cao was so overwhelmed by sadness and shame on his brother that he resigned his office and left home.

# If Guan Yu discovers the whereabouts of Liu Bei ( whose fate was unknown after the battle ) one day, he will leave Cao Cao and reunite with his sworn brother.

When Cao Cao inquired the reason, Guan Yu replied, " Sir, I'm very grateful to you for the steed because with it, I can reach my sworn brother in a shorter period of time if I ever know where he is.

He decided to leave Cao Cao with Liu Bei's wives to rejoin his sworn brother.

" Afterwards, Cao Song ceased to believe his brother regarding Cao Cao, and thus Cao Cao became even more blatant and perseverant in his wayward pursuits.

* Cao Ren, cousin of the warlord Cao Cao ( d. 223 )

* Cao Ren, general of Wei ( b. 168 )

In 219, Guan Yu advanced north, attacking Fancheng, scoring a major victory over Cao Ren.

Guan Yu, who is in charge of Jing Province, leads his troops to attack Cao Ren in the Battle of Fancheng.

After almost a year of fighting, Cao Cao could no longer afford continuous loss of materiel and labor in the siege, and ordered Cao Ren to withdraw from Jiangling fortress.

In 219, Guan Yu attacked the nearby enemy city of Fancheng ( present-day Fancheng District, Xiangyang, Hubei ), which was guarded by Cao Ren, and besieged it.

As he was threatened by rival Yuan Shao in the north and could not divide his attention, Cao Cao attempted to further reinforce the alliance with Sun Ce by marrying the daughter of his relative Cao Ren to Sun Ce's youngest brother Sun Kuang.

Cao Cao became concerned about such developments in his rear, but his cousin Cao Ren observed that Liu Bei could not have too much control over his new men given by Yuan Shao.

So Cao Cao sent Cao Ren to deal with the rebellion.

Cao Ren succeeded, killing the rebel leader Liu Pi and routing Liu Bei.

Cao Ren again responded to the threat by defeating Han Meng at Mount Jiluo ( 雞洛山 ; 50 li northeast of present-day Xinmi, Henan ).

In 219, Cao Cao's cousin and leading general Cao Ren was besieged at the fortress at Fancheng ( 樊城 ; present-day Fancheng District, Hubei ) by Guan Yu.