Canadians have long associated Prohibition with the colorful history of the Jazz Age in the United States. But even before the American ban that was in place from 1920 to 1933, Canada initiated its own Prohibition. The so-called Cold Water Army was led by zealots and prudes preaching hellfire and damnation, but also by committed social reformers who recognized the ill effects of excessive drinking. In March 1918, the federal government banned the manufacture and importation of liquor. For the next 21 months, Canada was as dry as any law could make it, which admittedly was not very dry....