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the beginning of what is known as the Gangster Era, a time that roughly spans from 1919 until 1933 when Prohibition was repealed.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
Prohibition had a notable effect on the alcohol brewing industry in the United States. Wine historians note that Prohibition destroyed what was a fledgling wine industry in the United States. Productive, wine-quality grapevines were replaced by lower-quality vines that grew thicker-skinned grapes, which could be more easily transported. Much of the institutional knowledge was also lost as winemakers either emigrated to other wine-producing countries or left the business altogether. Distilled spirits became more popular during Prohibition. Because of its higher alcohol content in comparison to fermented wine and beer, it became common to mix and dilute the hard alcohol.