Prime Minister of Rhodesia held the post until the end of Federation on 31 December 1963. When Northern Rhodesia gained independence as Zambia on 24 October 1964, Southern Rhodesia began to refer to itself simply as "Rhodesia". Prime Minister Ian Smith's government issued a Unilateral Declaration of Independence from Britain in 1965, and he remained Prime Minister when the country was declared a republic in 1970. Under the Internal Settlement in 1979, after a long period of conflict, the country became known as Zimbabwe-Rhodesia, with Abel Muzorewa as its first black Prime Minister. None of these acts were recognised internationally, and under the Lancaster
Northern Rhodesia districts. The British South Africa Company was responsible for building the Rhodesian railway system in the period of primary construction which ended in 1911, when the main line through Northern Rhodesia crossed the Congo border to reach the Katanga copper mines. Rhodes' original intention was for a railway extending across the Zambezi to Lake Tanganyika, but when little gold was found in Mashonaland, he accepted that the scheme to reach Lake Tanganyika had no economic justification. Railways built by private companies needed traffic that can pay high freight rates, such as large quantities of minerals. A line from Kimberley reached