The Three Kingdoms of Cao Wei, Shu Han, and Eastern Wu dominated China from 220 to 280 AD following the end of the Han dynasty.[1] This period was preceded by the Eastern Han dynasty and followed by the Western Jin dynasty. Academically, the periodisation begins with the establishment of Cao Wei in 220 and ends with the conquest of Wu by Jin in 280. The period immediately preceding the Three Kingdoms from 184 to 220 was marked by chaotic infighting among warlords across China as Han authority collapsed. The period from 220 to 263 was marked by a comparatively stable arrangement between Cao Wei, Shu Han, and Eastern Wu. This stability broke down with the conquest of Shu by Wei in 263, followed by the usurpation of Cao Wei by Jin in 266, and ultimately the conquest of Wu by Jin in 280.
The Three Kingdoms period including the collapse of the Han is one of the bloodiest in Chinese history. A nationwide census taken in 280, following the reunification of the Three Kingdoms under the Jin shows a total of 2,459,840 households and 16,163,863 individuals which was only a fraction of the 10,677,960 households, and 56,486,856 individuals reported during the Han era.[2] While the census may not have been particularly accurate due to a multitude of factors of the times, in 280, the Jin did make an attempt to account for all individuals where they could.[3]
Technology advanced significantly during this period. Shu chancellor Zhuge Liang invented the wooden ox, suggested to be an early form of the wheelbarrow,[4] and improved on the repeating crossbow. Wei mechanical engineer Ma Jun is considered by many to be the equal of his predecessor Zhang Heng.[5] He invented a hydraulic-powered, mechanical puppet theatre designed for Emperor Ming of Wei, square-pallet chain pumps for irrigation of gardens in Luoyang, and the ingenious design of the south-pointing chariot, a non-magnetic directional compass operated by differential gears.
Several other starting points for the period are given by Chinese historians: the Yellow Turban Rebellion in 184;[6][7] the year after the beginning of the rebellion, 185;[8] Dong Zhuo deposing Emperor Shao of Han and enthroning Emperor Xian of Han in 189,[9][10] Dong Zhuo sacking Luoyang and moving the capital to Chang'an in 190,[11] or Cao Cao placing the emperor under his control in Xuchang in 196.[12][13][14][15][16]
In the third month of 184, Zhang Jiao, leader of the Way of Supreme Peace, a Taoist movement, along with his two brothers Zhang Liang and Zhang Bao, led the movement's followers in a rebellion against the government that was called the Yellow Turban Rebellion. Their movement quickly attracted followers and soon numbered several hundred thousand and received support from many parts of China. They had 36 bases throughout China, with large bases having 10,000 or more followers and minor bases having 6,000 to 7,000, similar to Han armies. Their motto was:
Emperor Ling dispatched generals Huangfu Song, Lu Zhi, and Zhu Jun to lead the Han armies against the rebels, and decreed that local governments had to supply soldiers to assist in their efforts. It is at this point that the historical novel Romance of the Three Kingdoms begins its narrative. The Yellow Turbans were ultimately defeated and its surviving followers dispersed throughout China, but due to the turbulent situation throughout the empire, many were able to survive as bandits in mountainous areas, thus continuing their ability to contribute to the turmoil of the era.
With the widespread increase in bandits across the Chinese nation, the Han army had no way to repel each and every raiding party. In 188, Emperor Ling accepted a memorial from Liu Yan suggesting he grant direct administrative power over feudal provinces and direct command of regional military to local governors, as well as promoting them in rank and filling such positions with members of the Liu family or court officials. This move made provinces (zhou) official administrative units, and although they had power to combat rebellions, the later intra-governmental chaos allowed these local governors to easily rule independently of the central government. Liu Yan was also promoted as governor of Yi Province (roughly covering the Sichuan Basin). Soon after this move, Liu Yan severed all of his region's ties to the Han imperial court, and several other areas followed suit.
In the same year, Emperor Ling died, and another struggle began between the court eunuchs for control of the imperial family. Court eunuch Jian Shuo planned to kill Regent Marshal He Jin, a relative of the imperial family, and to replace the crown prince Liu Bian with his younger brother Liu Xie, the Prince of Chenliu (present-day Kaifeng), though his plan was unsuccessful. Liu Bian took the Han throne as Emperor Shao, and He Jin plotted with warlord Yuan Shao to assassinate the Ten Attendants, a clique of twelve eunuchs led by Zhang Rang who controlled much of the imperial court. He Jin also ordered Dong Zhuo, the frontier general in Liang Province, and Ding Yuan, Inspector of Bing Province,[e] to bring troops to the capital to reinforce his position of authority. The eunuchs learned of He Jin's plot, and had him assassinated before Dong Zhuo reached the capital Luoyang. When Yuan Shao's troops reached Luoyang, they stormed the palace complex, killing the Ten Attendants and 2,000 of the eunuchs' supporters. Though this move effectively ended the century-long feud between the eunuchs and the imperial family, this event prompted the invitation of Dong Zhuo to the outskirts of Luoyang from the northwest boundary of China.
In East China, in an attempt to restore the power of the Han, a large coalition against Dong Zhuo began to rise, with leaders such as Yuan Shao, Yuan Shu, and Cao Cao. Many provincial officials were compelled to join or risk elimination. In 191, Sun Jian (Yuan Shu's subordinate) led an army against Dong Zhuo and drove him from Luoyang to Chang'an. In the following year, Dong Zhuo's former bodyguard L Bu assassinated Dong Zhuo. It is said that Dong Zhuo's body was thrown into the street with a lit wick in his navel, which supposedly burned with the same brilliance of the sun for a period of four days.[21][22]
In 192, there was some talk among the coalition of appointing Liu Yu, an imperial relative, as emperor, and gradually its members began to fall out. Most of the warlords in the coalition, with a few exceptions, sought the increase of personal military power in the time of instability instead of seriously wishing to restore the Han dynasty's authority. The Han empire was divided between a number of regional warlords. As a result of the complete collapse of the central government and eastern alliance, the North China Plain fell into warfare and anarchy with many contenders vying for success or survival. Emperor Xian fell into the hands of various warlords in Chang'an.[23]
Dong Zhuo, confident in his success, was slain by his follower L Bu, who plotted with minister Wang Yun. L Bu, in turn, was attacked by Dong Zhuo's former officers: Li Jue, Guo Si, Zhang Ji and Fan Chou. Wang Yun and his whole family were executed. L Bu fled to Zhang Yang, a northern warlord, and remained with him for a time before briefly joining Yuan Shao, but it was clear that L Bu was far too independent to serve another. Yuan Shao operated from Ye city in Ji Province, extending his power north of the Yellow River. Han Fu had formerly been the Governor of Ji Province, but he came under the control of Yuan Shao and was replaced by him.[24]
Between the Yellow and Huai rivers, a conflict had erupted between Yuan Shu, Cao Cao, Tao Qian (Governor of Xu Province) and L Bu. Cao Cao forced the Yellow Turbans to surrender in 192, drove Yuan Shu to the south of the Huai River in 193, inflicted devastation upon Tao Qian in 194, received the surrender of Liu Bei (then a commander under Tao Qian) in 196, and captured and executed L Bu in 198. Cao was now in complete control of the southern part of the North China Plain.[25]
In the northeast, Gongsun Du held control of the Liaodong Peninsula and its environs, where he had established a state. He was succeeded by his son Gongsun Kang in 204. In the north across the frontier, since the fall of imperial control, the region had become chaotic as the Xiongnu remnants came into conflict with the Xianbei. Goguryeo was invaded by warlord Gongsun Kang in 204, resulting in the Daifang Commandery. In 209, Kang invaded Goguryeo again, took the capital of Goguryeo and forced them to submit. Goguryeo was forced to move its capital further east.[26] In Liang Province (present-day Gansu), rebellion had erupted in 184. In the west, Liu Yan had been Governor of Yi Province since his appointment in 188. He was succeeded by his son Liu Zhang in 194. Directly north of Liu Zhang's territory, Zhang Lu, leader of the Five Pecks of Rice, led the theocratic government at Hanzhong commandery on the upper Han River. Liu Biao held control over his province as the Governor of Jing Province. Sun Quan held control over the lower Yangtze.[27]
In 194, Cao Cao went to war with Tao Qian of Xu Province, because Tao's subordinate Zhang Kai had murdered Cao Cao's father Cao Song. Tao Qian received the support of Liu Bei and Gongsun Zan, but even then it seemed as if Cao Cao's superior forces would overrun Xu Province entirely. Cao Cao received word that L Bu had seized Yan Province in his absence, and accordingly he retreated, putting a halt to hostilities with Tao Qian for the time being. Tao Qian died in the same year, leaving his province to Liu Bei. A year later, in 195, Cao Cao managed to drive L Bu out of Yan Province. L Bu fled to Xu Province and was received by Liu Bei, and an uneasy alliance began between the two.
Afterwards, L Bu betrayed Liu Bei and seized Xu Province, forming an alliance with Yuan Shu's remnant forces. Liu Bei, together with his followers Guan Yu and Zhang Fei, fled to Cao Cao, who accepted him. Soon, preparations were made for an attack on L Bu, and the combined forces of Cao Cao and Liu Bei invaded Xu Province. L Bu's men deserted him, Yuan Shu's forces never arrived as reinforcements, and he was bound by his own subordinates and executed on Cao Cao's order.
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