Northern Rhodesia the British South Africa Company administered territory of North-Western Rhodesia (now in Zambia), and Portuguese Angola although its boundary with Angola was not marked-out on the ground until later. The northern border of the British territory in North-Eastern Rhodesia and the British Central Africa Protectorate was agreed as part of an Anglo-German Convention in 1890, which also fixed the very short boundary between North-Western Rhodesia and German South-West Africa, now Namibia. The boundary between the Congo Free State and British territory was fixed by a treaty in 1894, although there were some minor adjustments up to the 1930s. Boundaries with
Prime Minister of Rhodesia Prime Minister of Rhodesia The Prime Minister of Rhodesia (before 1964, of Southern Rhodesia) was the head of government in Rhodesia. Rhodesia, which became a self-governing colony of Britain in 1923, unilaterally declared independence on 11 November 1965, and was thereafter an unrecognized state in practice until 1979. In December 1979, the country came under temporary British control, and in April 1980 the country gained recognized independence as Zimbabwe. Rhodesia's political system was modeled on the Westminster system, and the Prime Minister's role was similar to that of the same position in other countries with similar constitutional histories – Canada,