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 enaction of Swynnerton Plan. The villages were surrounded by deep, spike-bottomed trenches and barbed wire, and the villagers themselves were watched over by members of the Home Guard, often neighbours and relatives. In short, rewards or collective punishments such as curfews could be served much more readily after villagisation, and this quickly broke Mau Mau's passive wing. Though there were degrees of difference between the villages, the overall conditions engendered by villagisation meant that, by early 1955, districts began reporting starvation and malnutrition. One provincial commissioner blamed child hunger on parents deliberately withholding food, saying the latter were aware of