The Rebellion of the Three Guards (simplified Chinese: 三监之乱; traditional Chinese: 三監之亂; pinyin: Sānjiànzhī Luàn), or less commonly the Wu Geng Rebellion, was a civil war, instigated by an alliance of discontent Zhou princes, Shang loyalists, vassal states and non-Chinese peoples against the Zhou government under the Duke of Zhou's regency in the latter 11th century BC. Edward L. Shaughnessy called the rebellion "a succession crisis that has come to be seen as defining moment not only for the Western Zhou dynasty but for the entire history of Chinese statecraft".