the Yalta Conference of February 1945, Stalin, Churchill, and U.S. President Franklin D. Roosevelt had agreed to meet following the surrender of Germany to determine the postwar borders in Europe.
the principle that the US should give support to countries or peoples threatened by Soviet forces or Communist insurrection. First expressed in 1947 by US President Truman in a speech to Congress seeking aid for Greece and Turkey, the doctrine was seen by the Communists as an open declaration of the Cold War.
the action or policy of preventing the expansion of a hostile country or influence.
Nato Warsaw pact
The Marshall Plan (officially the European Recovery Program, ERP) was an American initiative passed in 1948 to aid Western Europe, in which the United States gave over $12 billion (nearly $100 billion in 2016 US dollars) in economic assistance to help rebuild Western European economies after the end of World War II.
The Berlin Airlift, 1948–1949. At the end of the Second World War, U.S., British, and Soviet military forces divided and occupied Germany. Also divided into occupation zones, Berlin was located far inside Soviet-controlled eastern Germany.
The Warsaw Pact was a collective defense treaty established by the Soviet Union and seven other Soviet satellite states in Central and Eastern Europe