Mau Mau Uprising Kikuyu landholdings and forged ties with the colonial administration, leading to an economic rift within the Kikuyu. Mau Mau were the militant wing of a growing clamour for political representation and freedom in Kenya. The first attempt to form a countrywide political party begun on 1 October 1944. This fledgling organisation was called the Kenya African Study Union with Harry Thuku as its inaugural chairman. He soon resigned his chairmanship. There is dispute over Thuku's reason for leaving KASU: Bethwell Ogot states that Thuku "found the responsibility too heavy"; David Anderson states that "he walked out in disgust" as the
Operation Anvil (Mau Mau Uprising) in the process. Erskine intended on relocating all Kikuyu, Embu, and Meru people from Nairobi, but the colonial government rejected the plan, citing potential harm to the local economy and administration. The operation was based on one British security forces had conducted in Tel Aviv, Palestine. Its legality was assured by the Emergency Regulations and the Control of Nairobi Regulations of 1954, the latter of which permitted the colonial governor to issue "Evacuation Orders" to remove and detain individuals from the city so they could be screened for connections with the Mau Mau. Four battalions were earmarked for the action.