Sun Quan (182–252), style name Zhongmou, formally known as Emperor Da of Wu, was the founder of the state of Eastern Wu during the Three Kingdoms period. He ruled from 222 to 229 as the "King of Wu" and from 229 to 252 as the "Emperor of Wu".
In his youth, Sun Quan spent time in his home county of Fuchun, in present-day Zhejiang, and after the death of his father Sun Jian in the early 190s, at various cities on the lower Yangtze River. His older brother Sun Ce carved out a warlord state in the region of present-day Zhejiang, based on his own followers and a number of local clan allegiances. When Sun Ce was assassinated by the retainers of Xu Gong in 200, the eighteen-year-old Sun Quan inherited the lands southeast of the Yangtze River from his brother. His administration proved to be relatively stable in those early years. Sun Jian and Sun Ce's most senior officers, such as Zhou Yu, Zhang Zhao, Zhang Hong, and Cheng Pu remained loyal; in fact it was mentioned in Romance of the Three Kingdoms that Sun Ce had at his deathbed reminded Sun Quan that "in internal matters, consult Zhang Zhao, in external matters, consult Zhou Yu." Thus throughout the 200s, Sun Quan, under the tutelage of his able advisors, continued to build up his strength along the Yangtze River. In early 207, his forces finally won complete victory over Huang Zu, a military leader under Liu Biao, who dominated the middle Yangtze.
In winter of that year, the northern warlord Cao Cao led an army of some 830,000 to conquer south to complete the reunification of China. Two distinct factions emerged at his court on how to handle the situation. One, led by Zhang Zhao, urged surrender whilst the other, led by Zhou Yu and Lu Su, opposed capitulation. In the finality, Sun Quan decided to oppose Cao Cao in the middle Yangtze with his superior riverine forces. Allied with Liu Bei and employing the combined strategies of Zhou Yu and Huang Gai, they defeated Cao Cao decisively at the Battle of Red Cliffs.
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. It was not until the year 229 that he formally declared himself emperor.
Because of his skill in gathering important, honourable men to his cause, Sun Quan was able to delegate authority to capable figures. This primary strength served him well in gaining the support of the common people and surrounding himself with capable generals.