Pieter Kenyon Fleming-Voltelyn van der Byl was a Rhodesian politician who served as his country's Foreign Minister from 1974 to 1979 as a member of the Rhodesian Front (RF). A close associate of Prime Minister Ian Smith, Van der Byl opposed attempts to compromise with the British government and domestic black nationalist opposition on the issue of majority rule throughout most of his time in government. However, in the late 1970s he supported the moves which led to majority rule and internationally recognised independence for Zimbabwe.

Rhodesia, officially from 1970 the Republic of Rhodesia, was an unrecognised state in Southern Africa from 1965 to 1979, equivalent in territory to modern Zimbabwe. Rhodesia was the de facto successor state to the British colony of Southern Rhodesia, which had been self-governing since achieving responsible government in 1923. A landlocked nation, Rhodesia was bordered by Botswana to the southwest, Mozambique to the east, South Africa to the south, and Zambia to the northwest. From 1965 to 1979, Rhodesia was one of two independent states on the African continent governed by a white minority of European descent and culture, the other being South Africa.