Government of Rhodesia

British settlement in the area began in the 1830s, and Cecil Rhodes' British South Africa Company assumed control in the 1890s. Britain took over administration from the Company in 1923 and granted self-government to white colonists. Southern Rhodesia federated in 1953 with Northern Rhodesia and Nyasaland with a view to achieving independence as a unified country. The Federation dissolved in 1963, and the three constituent countries pursued separate paths to independence. Britain rejected independence for the white Southern Rhodesia regime in 1964, and the government unilaterally declared independence (UDI) in 1965 as Rhodesia. British colonial rule was briefly reimposed in 1979 in order to achieve a settlement, and independence was granted in 1980 under black majority rule as Zimbabwe.

From the guide to the Rhodesia: Unilateral Declaration of Independence, 1964-1967, (Institute of Commonwealth Studies)