The region was developed by Cecil Rhodes through the British South Africa Company, which administered it until Southern Rhodesia became a self-governing British colony in 1923 and Northern Rhodesia a British protectorate in 1924. From 1953 to 1963 Northern and Southern Rhodesia were united with Nyasaland (now Malawi) to form the Federation of Rhodesia and Nyasaland. The name Rhodesia was adopted by Southern Rhodesia when Northern Rhodesia left the Federation in 1963 to become the independent republic of Zambia; Rhodesia became independent Zimbabwe in 1979.