Introduction: Chicago: microcosm of America -- Part I. Before the war -- "Throw the dictionary at it": Chicago in 1913 -- Preparedness and public opinion: why Chicago went to war -- Part II. Chicago's soldiers -- "Kia-Kiak": the Black Hawk division -- Black devils and partridges: the 370th Infantry Regiment -- Part III. Life on the home front -- Wheatless, meatless, and coalless: patriotic Chicago -- Chicago's bright ideas: the four minute men and the American Patriotic League -- Part IV. Chicago women and the sexual revolution -- "The work is there to do": Chicago women in wartime -- "Sex o'clock in America": Chicago and the first sexual revolution -- Part V. Chicago's changing ethnic landscape -- "The biggest town in the world": the great migration -- "That was music": Chicago jazz -- "Sweet home Chicago": the Chicago blues -- "Coming to stay": the beginning of Mexican Chicago -- The end of Kultur: the plight of Chicago's Germans -- Part VI. After the war -- "Taking new heart": organized labor and the postwar strikes -- "Eyes to the future": Chicago in 1919