Mau Mau Uprising of Kikuyu, Embu and Meru were oathed. On 3 October 1952, Mau Mau claimed their first European victim when they stabbed a woman to death near her home in Thika. Six days later, on 9 October, Senior Chief Waruhiu was shot dead in broad daylight in his car, which was an important blow against the colonial government. Waruhiu had been one of the strongest supporters of the British presence in Kenya. His assassination gave Baring the final impetus to request permission from the Colonial Office to declare a State of Emergency. Contrary to British propaganda and western perceptions of the
Mau Mau Uprising as "a complete blueprint for winning the war against Mau Mau using socioeconomic and civic reform." What developed, however, has been described as a British gulag. The Pipeline operated a white-grey-black classification system: 'whites' were cooperative detainees, and were repatriated back to the reserves; 'greys' had been oathed but were reasonably compliant, and were moved down the Pipeline to works camps in their local districts before release; and 'blacks' were the so-called 'hard core' of Mau Mau. These were moved up the Pipeline to special detention camps. Thus a detainee's position in Pipeline was a straightforward reflection of how cooperative