page_title: Eastern Wu
section_title: Beginnings and founding
hierarchical_section_title: Eastern Wu / History / Beginnings and founding
caption_attribution_description: 中文: 今蒲圻赤壁山上的峭壁上，“赤壁”二个大字传为周瑜亲书，其说法不可靠。有人认为，“其时楷书尚未形成，因此可断定其书刻年代当在唐代以后”，亦不可盡信。 English: Photo of the traditional site of Chibi, south of Wulin, taken in 2003. en:vi:Image:Xich Bich.jpg
context_page_description: Wu, commonly known as Dong Wu or Sun Wu, was one of the three major states that competed for supremacy over China in the Three Kingdoms period. It previously existed from 220–222 as a vassal kingdom nominally under Cao Wei, its rival state, but declared independence from Wei and became a sovereign state in 222. It became an empire in 229 after its founding ruler, Sun Quan, declared himself emperor. Its name was derived from the place it was based in — the Jiangnan region, which was also historically known as "Wu". It was referred to as "Dong Wu" or "Sun Wu" by historians to distinguish it from other Chinese historical states with similar names which were also located in that region, such as the Wu state in the Spring and Autumn period and the Wuyue kingdom in the Five Dynasties and Ten Kingdoms period. It was called "Eastern Wu" because it occupied most of eastern China in the Three Kingdoms period, and "Sun Wu" because the family name of its rulers was "Sun". During its existence, Wu's capital was at Jianye, but at times it was also at Wuchang.
context_section_description: Towards the end of the Han dynasty, Sun Ce, the eldest son of the warlord Sun Jian, and his followers borrowed troops from the warlord Yuan Shu and embarked on a series of military conquests in the Jiangdong and Wu regions between 194 and 199, seizing several territories previously occupied by warlords such as Liu Yao, Yan Baihu and Wang Lang. Sun Ce broke off relations with Yuan Shu around 196-197 after the latter declared himself emperor — an act deemed as treason against Emperor Xian, the figurehead ruler of the Han dynasty. The warlord Cao Cao, who was the de facto head of government in the Han imperial court, asked Emperor Xian to grant Sun Ce the title of "Marquis of Wu" (吳侯).
  Sun Ce was assassinated in the summer of 200 and was succeeded by his younger brother, Sun Quan. Sun Quan, like his elder brother, also paid nominal allegiance to Emperor Xian while maintaining autonomous rule over the Wu territories. In 208, Sun Quan allied with the warlord Liu Bei and they combined forces to defeat Cao Cao at the Battle of Red Cliffs. Sun Quan and Liu Bei maintained their alliance against Cao Cao after the battle for the next ten years or so, despite having some territorial disputes over Jing Province. In 219, Sun Quan severed ties with Liu Bei when he sent his general Lü Meng to invade Liu's territories in Jing Province. Guan Yu, who was defending Liu Bei's assets in Jing Province, was captured and executed by Sun Quan's forces. After that, the boundaries of Sun Quan's domain extended from beyond the Jiangdong region to include the southern part of Jing Province, which covered roughly present-day Hunan and parts of Hubei.
  In 220, Cao Cao's son and successor, Cao Pi, ended the Han dynasty by forcing Emperor Xian to abdicate in his favour and established the state of Cao Wei. Sun Quan agreed to submit to Wei and was granted the title of a vassal king, "King of Wu" (吳王), by Cao Pi. A year later, Liu Bei declared himself emperor and founded the state of Shu Han. In 222, Liu Bei launched a military campaign against Sun Quan to take back Jing Province and avenge Guan Yu, leading to the Battle of Xiaoting. However, Liu Bei suffered a crushing defeat at the hands of Sun Quan's general Lu Xun and was forced to retreat to Baidicheng, where he died a year later.
  Liu Bei's successor, Liu Shan, and his regent, Zhuge Liang, made peace with Sun Quan later and reaffirmed their previous alliance. Sun Quan declared independence from Wei in 222, but continued to rule as "King of Wu" until 229, when he declared himself "Emperor of Wu". His legitimacy was recognised by Shu.
caption: Before the dynasty of Eastern Wu was established, the territory was defended by the Sun clan in the Battle of Red Cliffs.
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