cold war By ashley222 1945 united nations (UN) formed 1945 germany divided 1947 truman doctrine Period: 1947 to 1991 the cold war 1948 marshall plan 1948 berlin airlift 1949 NATO formed 1950 kim ll-sung invades south korea 1950 UN forces push north korea to yalu river - the border with china 1950 chinese forces cross yalu and enter korean war Period: 1950 to 1953 korean war 1953 ethel and julius rosenberg execution 1953 armistice signed 1955 warsaw pact formed 1957 sputnik 1