Northern Rhodesia had been detained without trial, following claims that they had planned the indiscriminate killing of Europeans and Asians, and of African opponents, the so-called "murder plot". Shortly afterwards, on 12 March 1959, the governor of Northern Rhodesia also declared a State of emergency there, arrested 45 Zambia African National Congress including Kaunda and banned the party. Kaunda later received a 19-month prison sentence for conspiracy, although no credible evidence of conspiracy was produced. The declaration of States of emergency in both Northern Rhodesia and Nyasaland marked the end of attempts by their nationalist parties to work within the colonial system,
Northern Rhodesia five shillings a year, but in 1920 the rate of hut tax was sharply increased, and often doubled, to provide more workers for the Southern Rhodesian mines, particularly the coal mines of Wankie. At this time the Company considered the principal economic benefit of Northern Rhodesia to be as a reservoir for migrant labour which could be called upon for Southern Rhodesia. British common law became the basis of the administration of Southern and Northern Rhodesia, unlike Roman Dutch law which applied in South Africa. In 1889, the British South African Company was given the power to establish a police