Southern Rhodesia was a self-governing British Crown colony in Southern Africa, established in 1923 and consisting of British South Africa Company (BSAC) territories lying south of the Zambezi River. The region was informally known as South Zambesia until Britain annexed it at the behest of the British South Africa Company. The colony was then renamed for that company’s founder, Cecil Rhodes. The bounding territories were Bechuanaland (Botswana), Northern Rhodesia (Zambia), Portuguese Mozambique (Mozambique) and the Transvaal Republic (for two brief periods known as the British Transvaal Colony; from 1910, the Union of South Africa and, from 1961, the Republic of South Africa). Since 1980, the colony's territory is the independent nation of Zimbabwe.
This southern region, known for its extensive gold reserves, was first purchased by the BSAC's Pioneer Column on the strength of a mineral concession extracted from its Matabele king, Lobengula, and various majority Mashona vassal chiefs in 1890. Though parts of the territory were laid-claim-to by the Bechuana and Portugal, its first people, the "Bushmen" (or Sān or Khoisan), had possessed it for countless centuries beforehand and had continued to inhabit the region. Following the colony's unilateral dissolution in 1970 by the Republic of Rhodesia government, the Colony of Southern Rhodesia was re-established in 1979 as the successor state to the Republic of Zimbabwe Rhodesia which, in-turn, was the predecessor state of the Republic of Zimbabwe. Its only true geographical borders were the rivers Zambezi and Limpopo, its other boundaries being (more or less) arbitrary, and merging imperceptibly with the peoples and domains of earlier chiefdoms of pre-colonial times.