Western Bloc

The Western Bloc, also known as the Free Bloc, Capitalist Bloc and the American Bloc, was a coalition of the countries that were allied with the United States and its ideology (liberalism), a member of NATO, opposed the Soviet Union and Warsaw Pact, and advocated Anti-Communism during the Cold War 1947-1991. The latter were referred to as the Eastern Bloc. The governments and the press of the Western Bloc were more inclined to refer to themselves as the Free World or the First World, whereas the Eastern Bloc was often called the "Communist World" or "Second World".

The "Three Worlds" of the Cold War era, April  August 1975
  First World: Western Bloc led by the USA, Japan, United Kingdom and their allies
  Second World: Eastern Bloc led by the USSR, China, and their allies
  Third World: Non-Aligned and neutral countries
Political situation in Europe during the Cold War