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
Flag of Southern Rhodesia Rhodesia for official use outside the colony and the Union Jack was the official flag internally. In 1956, Southern Rhodesia entered into a federal union with Northern Rhodesia and Nyasaland to form the Federation of Rhodesia and Nyasaland. Upon union, a blue ensign with a unified badge was adopted to replace the respective previous flags. Southern Rhodesia was represented in the federation's flag by a red lion that had previously been on their old flag. Following the collapse of the federation in 1964, Southern Rhodesia then started calling itself Rhodesia and adopted a new flag at the behest of the