The document discusses the formation of NATO and the Warsaw Pact during the Cold War period between 1945-1955. It describes events like the Berlin Airlift of 1948 in response to the Soviet blockade of West Berlin, the founding of NATO in 1949 and West Germany in the same year. It also discusses communist takeovers in countries like Poland and Czechoslovakia, as well as West Germany and Greece/Turkey joining NATO and the Soviet Union forming the Warsaw Pact in 1955 in response to West Germany rearming.