It officially started in 1947 with the Truman doctrine theorizing the "containment" policy, the Cold War had important consequences in Latin America. Latin America was considered by the United States to be a full part of the Western Bloc, called "free world", in contrast with the Eastern Bloc, a division born with the end of World War II and the Yalta Conference held in February 1945. It "must be the policy of the United States", Truman declared, "to support free peoples who are resisting attempted subjugation by armed minorities or outside pressures." Truman rallied to spend $400 million to intervene in the Greek civil war, while the CIA (created by the National Security Act of 1947) intervention in Greece was its first act in its infancy. By aiding Greece, Truman set a precedent for U.S. aid to regimes, no matter how repressive and corrupt, that requested help to fight communists. Washington began to sign a series of defense treaties with countries all over the world, including the North Atlantic Treaty of 1949, which created NATO, and the ANZUS in 1951 with Australia and New Zealand. Moscow responded to NATO and to the Marshall Plan in Europe with a plan which included the creation of the COMECON economic treaty and the Warsaw Pact defense alliance, as well as gathering Eastern Europe countries which had fallen under its sphere of influence. After the Berlin Blockade by the Soviet Union, the Korean War (1950–53) was one of the first conflicts of the Cold War, while the US succeeded France in the counter-revolutionary war against Viet-minh in Indochina.