21 October 1977
The United States, Netherlands, Great Britain, West Germany and Belgium all recalled their Ambassadors from South Africa for consultations. South Africa received worldwide criticism for its Apartheid policy which was introduced by the National Party government in 1948. The policy instituted racial segregation in the country.
References

O’Malley, P. ‘1977’, from Nelson Mandela Centre of Memory, [online], Available at www.nelsonmandela.org [Accessed: 18 October 2013]|Kalley, J.A.; Schoeman, E. & Andor, L.E. (1999), Southern African Political History: a chronology of key political events from independence to mid-1997, (Westport: Greenwood) p. 431