 The SPG, alongside the Church Mission Society (CMS), continued to be one of the leading agencies for evangelistic mission and relief work for the Churches of England, Wales, and Ireland in the decades following the Second World War.In the context of decolonization in Africa and India's independence in 1947, new models of global mission engagement between the interdependent member provinces of the Anglican Communion were required.In 1965 the SPG merged with the Universities' Mission to Central Africa (UMCA), and in 1968 with the Cambridge Mission to Delhi, to form the United Society for the Propagation of the Gospel (USPG).