Early Cold war By danon.curry Period: 1945 to 1945 United nations formed Period: 1947 to 1947 Truman doctrine Period: 1948 to 1948 Berlin Airlift Period: 1948 to 1948 marshall plan Period: 1949 to 1949 NATO established Period: 1950 to 1953 Korean war Period: 1951 to 1951 Rosensberg trials Period: 1952 to 1952 First H bomb detonated by u.s