us history 1887-2008 By dulcemora Period: 1776 to 1860 early american history Period: 1860 to 1877 civil war/ reconstruction Period: 1877 to 1900 the gilded age Period: 1890 to 1920 the progressive era Period: 1890 to 1920 imperialism Period: 1914 to 1918 world war 1 Period: 1920 to 1929 roaring twenties Period: 1929 to 1939 great depression Period: 1939 to 1945 world war 2 Period: 1945 to 1960 early cold war Period: 1945 to 1945 united nations form Period: 1947 to 1947 truman doctrine Period: 1948 to 1949 berlin airlift Period: 1948 to 1948 marshall plan Period: 1949 to 1949 Nato Established Period: 1950 to 1970 civil rights era Period: 1950 to 1953 korean war Period: 1951 to 1951 rosenberg trial Period: 1952 to 1952 first h bomb detonated by the U.S Period: 1954 to 1976 Vietnam war Period: 1955 to 1955 jonas salk invents the polio vaccine Period: 1957 to 1957 ussr launches sputnik Period: 1970 to 1991 end of the cold war Period: 1990 to 2008 1900s-21st Century