三藩之乱
Driven by the threat to their interests, the three revolted and thus began the eight-year-long civil war known as the Revolt of the Three Feudatories. Before the rebellion, Wu sent a confidant to Beijing to retrieve Wu Yingxiong, his son and the young emperor's uncle-in-law; but his son disagreed. The confidant only brought back Wu Shipan, Wu Yingxiong's son by a concubine. On 28 December 1673, Wu killed Zhu Guozhi, the governor of Yunnan, and rebelled "against the alien and rebuilding Ming dynasty". On 7 January 1674, 62-year-old Wu led troops from Yunnan on the northern expedition and took the whole territory of Guizhou province without any loss. Wu Yingxiong and his sons with Princess Jianning was executed by the Kangxi Emperor soon after his father's rebellion. Shortly afterwards, Wu founded his own Zhou dynasty. By April 1674, Wu Sangui's army had quickly occupied Hunan, Hubei, Sichuan, and Guangxi. In the next 2 years, Geng Jingzhong, Wang Fuchen, and Shang Zhixin successively rose in rebellion, and Wu's rebellion had expanded into the Revolt of the Three Feudatories. By April 1676, the rebel force possessed 11 provinces (Yunnan, Guizhou, Sichuan, Shanxi, Gansu, Hunan, Guangdong, Guangxi, Fujian, Zhejiang, and Jiangxi). For a moment, the situation seemed to favor Wu.