The external reactions

The formation of frontline states. The states neighbouring South Africa decided to join the struggle against apartheid in South Africa.
The formation of the SADCC. In order to blockade South African's trade. South African countries formed the SADCC- South African Development Co-ordination Council.
Expulsion from the common wealth. The former British colonies in Africa and Asia had formed their organisation called the British Common Wealth.
Isolation from the Olympics. The international Olympics committee also banned South Africa from participating in World Olympic games.
Pressure from investors. The international corporations, which had invested heavily in South Africa, pressurised the Pretoria government to abandon apartheid because it was causing them business losses resulting from Sanctions, guerrilla attacks on their firms etc.
Pan African pressure from U.S.A. The Pan Africanists within U.S.A. pressurised the Jimmy Carter regime (1977-1980) to slam a trade ban on South Africa and cut off diplomatic and military dealings with her.
Pressure from communist countries. The Eastern block branded apartheid as "a son of capitalism".
Opposition from the OAU and UNO.
Opposition by the church. Both the South African clergy and international churches condemned apartheid e.g Arch Bishop Desmond Tutu of South Africa.

National Movements and New States in Africa