Chicago
The ratification of the 18th amendment to the Constitution in 1919 made the production and sale (including exportation) of alcoholic beverages illegal in the United States. This ushered in the beginning of what is known as the Gangster Era, a time that roughly spans from 1919 until 1933 when Prohibition was repealed. The 1920s saw gangsters, including Al Capone, Dion O'Banion, Bugs Moran and Tony Accardo battle law enforcement and each other on the streets of Chicago during the Prohibition era. Chicago was the location of the infamous St. Valentine's Day Massacre in 1929, when Al Capone sent men to gun down members of a rival gang, North Side, led by Bugs Moran.
Prohibition in the United States
Proliferation of neighborhood saloons in the post-Civil War era became a phenomenon of an increasingly industrialized, urban workforce. Workingmen's bars were popular social gathering places from the workplace and home life. The brewing industry was actively involved in establishing saloons as a lucrative consumer base in their business chain. Saloons were more often than not linked to a specific brewery, where the saloonkeeper's operation was financed by a brewer and contractually obligated to sell the brewer's product to the exclusion of competing brands. A saloon's business model often included the offer of a free lunch, where the bill of fare commonly consisting of heavily salted food meant to induce thirst and the purchase of drink. During the Progressive Era (1890–1920), hostility toward saloons and their political influence became widespread, with the Anti-Saloon League superseding the Prohibition Party and the Woman's Christian Temperance Union as the most influential advocate of prohibition, after these latter two groups expanded their efforts to support other social reform issues, such as women's suffrage, onto their prohibition platform.