As the US entered World War I in 1917, a burst of patriotism in New Orleans collided with civil liberties. The city, due to its French heritage, shared a strong cultural tie to the Allies, and French speakers from Louisiana provided vital technical assistance to the US military during the war effort. Meanwhile, citizens of German heritage were harassed by unscrupulous, ill-trained volunteers of the American Protective League, ordained by the Justice Department to shield America from enemies within. As a major port, the wartime mobilization dramatically reshaped the cultural landscape of the...