Is “As regent, he quelled the Rebellion of the Three Guards” true?
attested in history
According to the Records of the Grand Historian, in the Hereditary House of the Duke of Zhou, when King Cheng was young, the Duke of Zhou acted as regent and ascended to the position, putting down the rebellions of Guan Shu, Cai Shu, and Wu Geng, establishing rites and music, and consolidating the foundation of the Zhou dynasty.
Duke of Zhou
In official history, he is an outstanding statesman who established rites and music and served as regent to consolidate the Zhou dynasty, while in fiction, he is portrayed with a focus on his civil strategies and Daoist mysticism.