Kronstadt, 1921In March 1921 the sailors of Kronstadt, the naval fortress in the Gulf of Finland, rose in revolt against the Bolshevik government, which they themselves had helped into power. Under the slogan of free soviets, '' they established a revolutionary commune that survived for sixteen days, until an army came across the ice to crush it. After a savage struggle, the rebels were subdued. Paul Avrich vividly describes the uprising and examines it in the