militant African nationalist movement that originated in the 1950s among the Kikuyu people of Kenya. The Mau Mau (origin of the name is uncertain) advocated violent resistance to British domination in Kenya; the movement was especially associated with the ritual oaths employed by leaders of the Kikuyu Central Association to promote unity in the independence movement.

In 1950 the Mau Mau were banned by British authorities, and in October 1952, after a campaign of sabotage and assassination attributed to Mau Mau terrorists, the British (British Empire) Kenya government declared a state of emergency and began four years of military operations against Kikuyu rebels. By the end of 1956, more than 11,000 rebels had been killed in the fighting, along with about 100 Europeans and 2,000 African loyalists. More than 20,000 other Kikuyu were put into detention camps, where intensive efforts were made to convert them to the political views of the government—i.e., to abandon their nationalist aspirations. Despite these government actions, Kikuyu resistance spearheaded the Kenya independence movement, and Jomo Kenyatta (Kenyatta, Jomo), who had been jailed as a Mau Mau leader in 1953, became prime minister of an independent Kenya 10 years later. In 2003 the ban on the Mau Mau was lifted by the Kenyan government.