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 cattle farming in Barotseland, but Northern Rhodesia had attracted little white settlement, in contrast to its southern neighbour. Unlike Southern Rhodesia, which had seen a flood of fortune-seeking prospectors seeking to set up independent mines, Northern Rhodesia's mining policy was to agree large-scale deals with major commercial mining companies. Large-scale mining on the Northern Rhodesian Copperbelt started after 1924 and was mainly financed from the United States of America and South Africa. Chester Beatty's and Sir Edmund Davis's Selection Trust already had an interest in the fairly small Bwana Mkubwa copper mine, which had opened in 1901 on the site