Liu Bei (161 – 21 June 223) was a warlord, military general and later the founding emperor of the state of Shu Han during the Three Kingdoms era of Chinese history. Despite having a later start than his rivals and lacking both the material resources and social status they commanded, Liu Bei overcame his many defeats to carve out his own realm, which at its peak spanned modern day Sichuan, Guizhou, Hunan, part of Hubei and part of Gansu.

Culturally, due to the popularity of the novel Romance of the Three Kingdoms by Luo Guanzhong, Liu Bei is widely known as the ideal benevolent, humane ruler who cared for his people and selected good advisors for his government. His fictional character was a salutary example of a ruler who adhered to the Confucian set of moral values, such as loyalty and compassion. Historically, Liu Bei was a brilliant politician and leader whose skill was a remarkable demonstration of a Legalist. His political philosophy can best be described by the Chinese idiom "Confucian in appearance but Legalist in substance (Chinese: 儒表法裡; pinyin: rú biǎo fǎ lǐ)," a style of governing which had become the norm after the founding of the Han Dynasty.

From the late 230s tensions began to become visible between the imperial Cao clan and the Sima clan. Following the death of Cao Zhen, factionalism was evident between Cao Shuangand the Grand Tutor Sima Yi. In deliberations, Cao Shuang placed his own supporters in important posts and excluded Sima Yi, whom he regarded as a dangerous threat. The power of the Sima clan, one of the great landowning families of the Han Dynasty, was bolstered by Sima Yi's military victories. Additionally, Sima Yi was an extremely capable strategist and politician. In 238 he crushed the rebellion of Gongsun Yuan and brought the Liaodong region directly under central control. Ultimately, he outmaneuvered Cao Shuang in power play. Taking advantage of an excursion by the imperial clansmen to the Gaoping Tombs, Sima Yi undertook a putsch in Luoyang, forcing Cao Shuang's faction from authority. Many protested against the overwhelming power of the Sima family; notable among these were the Seven Sages of the Bamboo Grove. One of the sages, Xi Kang, was executed as part of the purges after Cao Shuang's downfall.