Early Cold War

United Nations formed

Period: 1945 to 1945

Truman Doctrine

Period: 1947 to 1947

U.S. policy that gave military and economic aid to countries threatened by communism

Berlin Airlift

Period: 1948 to 1948

Marshall Plan

Period: 1948 to 1948

program to help European countries rebuild after World War II

NATO established

Period: 1949 to 1949

Korean War

Period: 1950 to 1953

Rosenbergs trial

Period: 1951 to 1951

22nd Amendment

Period: 1951 to 1951

prohibits anyone who has been elected president twice from being elected again

First H-Bomb detonated by the United States

Period: 1952 to 1952

Jonas Salk invents the Polio Vaccine

Period: 1955 to 1955

USSR launches Sputnik

Period: 1957 to 1957