These days, rural Oklahoma is the last place anybody would look for leftist revolutionaries, but in 1917 the area exploded into full-blown insurrection. The state's tenant farmers, many of whom were Socialist Party members, viewed the Great War in Europe as a conflict that benefited only the rich. When the federal government enacted a draft, an uprising in eastern Oklahoma saw local townspeople skirmishing with rebellious farmers, including whites, blacks, and American Indians. Although the insurrection itself succeeded only in undermining the socialist movement and fueling the Red Scare of...