This thesis provides a survey and an analysis of South Africa's relations with the British Commonwealth (Commonwealth of Nations) between the years 1945 and 1961. It outlines and explains the deterioration of this relationship in the context of the crisis in South Africa's foreign relations after World War II. Documentary evidence is produced to throw more light on the relationship with Britain and, to a lesser extent, other Commonwealth countries. This relationship is analysed in the context of political, economic and strategic imperatives which made it necessary for Britain to continue to seek South Africa's co-operation within the Commonwealth. This thesis also describes how the African and Asian influence began to be felt within the C...