Operation Anvil (Mau Mau Uprising) authorities. Within 48 hours the British had detained 206 known insurgents. In the following weeks over 50,000 Africans were detained and questioned. Nevetheless, numerous leading figures among the rebels managed to escape from Nairobi into the countryside. The operation ended on 26 May. Operation Anvil marked a turning-point in the British campaign against the Mau Mau. The action left the insurgents mostly isolated in the forested mountains of Nyandarwa and Kirinyaga without access to supplies and the assistance of passive supporters. It proved to be the most sophisticated undertaking of the Kenyan Emergency. In the following weeks Mau Mau activity
Mau Mau Uprising used stolen weapons such as guns, as well as weapons such as machetes and bows and arrows in their attacks. In a few limited cases, they also deployed biological weapons. Women formed a core part of the Mau Mau, especially in maintaining supply lines. Initially able to avoid the suspicion, they moved through colonial spaces and between Mau Mau hideouts and strongholds, to deliver vital supplies and services to guerrilla fighters including food, ammunition, medical care, and of course, information. An unknown number also fought in the war, with the most high-ranking being Field Marshal Muthoni. The British and international