The Cold War was a period of confrontation between the two superpowers of the world, the United States and the Soviet Union. During the war, which simmered from 1947 to 1991, the USA and the USSR used different methods and tactics to expand their own global influence and reduce the other's. The impact and effects of this 'war' -although not a violent one - continues to have repercussions well into the 21st Century. Many politicians and political leaders played roles in the Cold War, both from the Eastern Bloc (the Soviet Union and its Warsaw Pact allies) and the Eastern Bloc (including USA and members of NATO). Among them, which people were the most important?