· Agreement
League of Nations mandate over South West Africa, 1920
South Africa received a League of Nations mandate over South West Africa on 17 December 1920 and, after refusing to place the territory under UN Trusteeship following the Second World War, continued to administer it; the International Court of Justice ruled in 1971 that this continued occupation was illegal.
Significance here: Established the disputed legal status of South African administration that the 1978 settlement plan and 1966-1989 insurgency were fought over.