Mau Mau Uprising attempt to eliminate Mau Mau's presence within Nairobi in one fell swoop. 25,000 members of British security forces under the control of General George Erskine were deployed as Nairobi was sealed off and underwent a sector-by-sector purge. All native Kenyans were taken to temporary barbed-wire enclosures, whereafter those who were not Kikuyu, Embu or Meru were released; those who were remained in detention for screening. Whilst the operation itself was conducted by Europeans, most suspected members of Mau Mau were picked out of groups of the Kikuyu-Embu-Meru detainees by a native Kenyan informer. Male suspects were then taken off for
Mau Mau Uprising noting the similarity between such analysis and the "simplistic" earlier studies of Mau Mau. This earlier work cast the Mau Mau war in strictly bipolar terms, "as conflicts between anti-colonial nationalists and colonial collaborators". Caroline Elkins' 2005 study, "Imperial Reckoning", has met similar criticism, as well as being criticised for sensationalism. Broadly speaking, throughout Kikuyu history, there have been two traditions: "moderate-conservative" and "radical". Despite the differences between them, there has been a continuous debate and dialogue between these traditions, leading to a great political awareness among the Kikuyu. By 1950, these differences, and the impact of colonial rule, had