The correct answer is the Iron Curtain.
The term iron curtain was made popular thanks to a speech given by Winston Churchill in 1946. In this commencement address, Churchill discusses how an "iron curtain" has descended upon Europe, splitting this area into satellite nations controlled by the communist Soviet Union and the countries free of Soviet control and influence. This metaphorical barrier would be referred to constantly during the Cold War era.
Answer:
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Because one of the major powers who instigated the war did not take part in it
Between 1870 and 1900 Africa territories were under European states control, such as Britain, France, Germany, Portugal among others. Besides, the majority of African territories lost their sovereignty and control of natural resources. Imperial policies which favored resource exploitation and cheap labor weakened local economies. As a result, revolts started to spread by the middle of the 20th century since colonies did not want to accept the Europeans policies which ruled African territories. The African Movements for independence from European rulers took place in the 20th century. It was a slow process; but, by 1977, 54 African countries got rid of European imperial rulers. Consequently, the word they received when the Africans pushed for independence was "Africa".