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 to have been sent to was the one run out of Embakasi Prison, for Embakasi was responsible for the Embakasi Airport, the construction of which was demanded to be finished before the Emergency came to an end. The airport was a massive project with an unquenchable thirst for labour, and the time pressures ensured the detainees' forced labour was especially hard. If military operations in the forests and Operation Anvil were the first two phases of Mau Mau's defeat, Erskine expressed the need and his desire for a third and final phase: cut off all the militants' support in the