Herero Chief's Council submitted a number of petitions to the UN in the 1950s calling for it to grant Namibia independence but was not successful. During the 1960s, as European powers such as France and the United Kingdom granted independence to some colonies and trust territories in Africa, pressure mounted on South Africa to do so in Namibia.In 1966 the International Court of Justice dismissed a complaint brought by Ethiopia and Liberia against South Africa's continued presence in the territory, but the U.N. General Assembly subsequently revoked South Africa's mandate. South Africa continued to exercise de facto rule while SWAPO expanded its guerrilla efforts to end that. In 1971 the International Court of Justice issued an "advisory opinion" declaring South Africa's continued administration to be illegal.[27]Map of Bantustans, land set aside for black inhabitation, in South West AfricaIn response to the 1966 ruling by the International Court of Justice, South-West Africa People'