Operation Anvil (Mau Mau Uprising) the reserves. The "Grey" grade was made up of prisoners believed to be passive Mau Mau sympatherisers though for whom strong evidence suggesting their true loyalties was lacking. The last category, "Black", was reserved for detainees identified by the hooded informers or the Special Branch of the Kenya Police as potentially violent insurgents or terrorists. A few may have been prosecuted by the government, but most were funneled through the "Pipeline", a system of work camps, decreasing in brutality until an individual was "re-educated" and deemed safe to release on a native reserve. Operation Anvil (Mau Mau Uprising) Operation Anvil
Mau Mau Uprising the Pipeline. There were originally two types of works camps envisioned by Baring: the first type were based in Kikuyu districts with the stated purpose of achieving the Swynnerton Plan; the second were punitive camps, designed for the 30,000 Mau Mau suspects who were deemed unfit to return to the reserves. These forced-labour camps provided a much needed source of labour to continue the colony's infrastructure development. Colonial officers also saw the second sort of works camps as a way of ensuring that any confession was legitimate and as a final opportunity to extract intelligence. Probably the worst works camp