* August 7 – The Ming Dynasty Chinese military general Cao Qin stages a coup against the Tianshun Emperor ; after setting fire to the eastern and western gates of the Imperial City ( Beijing ) ( which are doused by pouring rains during the day-long uprising ), Cao Qin finds himself hemmed in on all sides by imperial forces, loses three of his own brothers in the fight, and instead of facing execution he flees to his home in the city and commits suicide by jumping down a well located within his walled compound.

In 197, Yuan Shu, who was at odds with Cao Cao, Yuan Shao, and Liu Bei, felt assured of victory with his subordinate's conquests, and thus declared himself emperor of the Cheng Dynasty.

After settling the nearby provinces, including a rebellion led by former Yellow Turbans, and internal affairs with the court, Cao Cao turned his attention north to Yuan Shao, who himself had eliminated his northern rival Gongsun Zan that same year.

Yuan Shao, himself of higher nobility than Cao Cao, amassed a large army and camped along the northern bank of the Yellow River.

* Cao Cao, Chinese warlord, established himself as king of the Kingdom of Wei.

When he dies his son Cao Pi succeeds to the throne and proclaims himself emperor of Wei.

In 220, Cao Pi, son of Cao Cao, seized the throne and proclaimed himself to be the Emperor of China, ending and succeeding the nominal rule of the Han Dynasty.

At first Sun Quan nominally served as a Wei vassal with the Wei-created title of King of Wu, but after Cao Pi demanded that he send his son Sun Deng as a hostage to the Wei capital Luoyang and he refused, in 222, he declared himself independent by changing his era name.

Sun Quan did not immediately submit to Wei or declare independence after Cao Pi's enthronement, but took a wait-and-see attitude ; by contrast, in early 221, Liu Bei declared himself emperor, establishing the state of Shu Han.

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.

Later in the year Cao Pi proclaimed himself the emperor of Cao Wei.

He proclaims himself " King of Hanzhong " after his victory over Cao Cao in the Hanzhong Campaign.

In 220, Cao Pi forced Emperor Xian, last ruler of the Han Dynasty, to abdicate and proclaimed himself Emperor of Wei.

Upon hearing this news at Cao Cao's headquarters at Yecheng, Cao Pi hastily declared himself the new Prince of Wei and issuing an edict in the name of his mother, Princess Bian, before receiving an official confirmation from Emperor Xian of Han, of whom he was still technically a subject.

* Cao Cao, last chancellor of the Han Dynasty ( d. 220 )

Cao Cao ( Wade-Giles: Tsao Tsao ; ; 155 – March 15, 220 ) was a warlord and the penultimate chancellor of the Eastern Han Dynasty who rose to great power during the dynasty's final years.

When Cao Cao became chancellor later, he wanted Ma Chao to serve in the capital city but Ma declined.

He was nominally subject to the Han Dynasty chancellor Cao Cao, while keeping his domain semi-independent of the central government.

Zhang Fei, who was left behind by Liu to guard Xiapi ( capital of Xu Province ), killed Cao Bao ( chancellor of Xiapi when Tao Qian was still in charge of Xu Province ) after an intense quarrel.

During the decline of the Han Dynasty, the northern part of China was under the control of Cao Cao, the chancellor to the last Han ruler, Emperor Xian.

Zhang Fei had a quarrel with Cao Bao ( former chancellor of Xiapi under the deceased Tao Qian ), and he killed the latter in a bedlam.

Before his death, Gaozu said Cao Shen can be chancellor after Xiao He dies, and Wang Ling may succeed Cao Shen.

Up to this point, Cao Cao's political legitimacy was only underpinned by his position as the chancellor.

Liu Bang's general Cao Wushang sent a messenger to see Xiang Yu, saying that Liu Bang would become King of Guanzhong in accordance with King Huai II's earlier promise, while Ziying would be appointed as Liu's chancellor.

During his stay in Xuchang, Kong Rong often opposed policies of the chancellor Cao Cao, the de facto ruler who held Emperor Xian under his control.

* Cao following Xiao's rules ( 萧规曹随 ): Cao Shen, Xiao He's successor as chancellor, inherited the system of governance left behind by Xiao and maintained it well but did not implement any new changes.

Zhang Fei, who was left behind by Liu to guard Xiapi ( capital of Xu Province at the time ), killed Cao Bao ( chancellor of Xiapi when Tao Qian was still in charge of Xu Province ) after an intense quarrel over some trivial things.

Cao Wushang ( 曹無傷 ), a defector from Liu Bang's side, secretly sent a messenger to Xiang Yu's camp, telling Xiang that Liu Bang was intending to name himself " King of Guanzhong " in accordance with King Huai II of Chu's earlier promise, while Ziying would be appointed as Liu's chancellor.

Liu leads his men and the civilians of Xinye on an exodus southwards and they arrive at Jiangxia ( present-day Yunmeng County, Hubei ) where Liu establishes a foothold against Cao Cao.

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

After pacifying the south, Zhuge Liang leads the Shu Han army on five military expeditions to attack Cao Wei in order to restore the Han Dynasty.

In the seventh installment, the battle clearly focuses on Cao Pi's point of view, where he leads the attack on Wuchao, defeating and recruiting Zhang He ( who'd been its defender instead of attacking Cao Cao's camp as in history ).

According to the story, in the battle against the forces of Cao Cao, Han Sui leads eight loyal generals of Ma Chao's into battle.

On 1 November 1963, the real coup went ahead, with Cao and Tung's troops isolated outside Saigon, unable to rescue Diệm and Nhu from the rebel encirclement.

On 25 May, 2, 500 Viet Minh troops overwhelmed the French fortress at Dong Khé, which lay at the strategic center of RC4, thus cutting the supply line between the French positions at Cao Bang and Lang Son.

Sun Quan sends Lü Meng to lead his troops to seize Jing Province while Guan is away, as part of his secret agreement with Cao Cao.

ARVN leaders and President Diem were criticized by the foreign press when the troops were used to crush armed anti-government religious groups like the Cao Dai and Hoa Hao as well as to raid Buddhist temples, which according to Diem, were harboring NLF guerrillas.

" The following afternoon, General Cao Van Vien, chief of the Vietnamese Joint General Staff, ordered his four corps commanders to place their troops on alert.

Yuan Shao withdrew his troops from Baima and Cao Cao's forces struck back eastward to relieve the siege on Baima.

The flood destroyed reinforcements troops from Cao Cao led by Yu Jin and Pang De.

Guan Yu was lured out of the city and besieged on a nearby knoll while the city fell to Cao Cao's troops.

When he saw the plight of Cao Cao's defeated troops and Zhang Liao, whom he befriended when he serving Cao earlier, he decided to allow Cao and his men to leave.

The apprehension was particularly heightened when, after Cao Cao's death, the Qing Province ( 青州, modern central and eastern Shandong ) troops under the powerful general, Zang Ba, suddenly deserted, leaving Luoyang and returning home.

There, Cao Cao heard about unrest in the north and ordered his troops to retreat east.

Cao Cao was alarmed and he sent Xu Huang and Cao Hong to lead 10, 000 troops to the pass, issuing orders for them to refrain from engaging the enemy and defend the pass for 10 days.

Cao Cao fled and he cut his beard and discarded his red robe during the escape to avoid being identified by Ma Chao's troops before being rescued by Cao Hong and Xiahou Yuan.