The Colony of Southern Rhodesia was a self-governing British crown colony located south of the Zambezi and north of the Limpopo River in southern Africa that existed from 1923 to 1980. Following its Unilateral Declaration of Independence in 1965 it existed as the self-declared, unrecognised state of Rhodesia until 1979, when it reconstituted itself under majority rule as Zimbabwe Rhodesia, which also failed to win overseas recognition.