Mau Mau Uprising between loyalists and Mau Mau was a product of the conflict, rather than a cause or catalyst of it, with the violence becoming less ambiguous over time, in a similar manner to other situations. Philip Mitchell retired as Kenya's governor in summer 1952, having turned a blind eye to Mau Mau's increasing activity. Through the summer of 1952, however, Colonial Secretary Oliver Lyttelton in London received a steady flow of reports from Acting Governor Henry Potter about the escalating seriousness of Mau Mau violence, but it was not until the later part of 1953 that British politicians began to accept
Operation Anvil (Mau Mau Uprising) Mau" movement, had proliferated the Kikuyuland region. On 20 October the colonial governor declared a state of emergency, initiating efforts by the British military to put down the insurgency. The first months of the British campaign were plagued by a lack of discipline, communication, coherent strategy, and useful intelligence and little progress was made against the Mau Mau. An assault on the Naivasha police station and a massacre of civilians in the village of Lari in March 1953 dramatically escalated the conflict. Mau Mau activity also began to surface in the city of Nairobi, which had a large Kikuyu population.