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the beginning of what is known as the Gangster Era, a time that roughly spans from 1919 until 1933 when Prohibition was repealed.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
In 1881 Kansas became the first state to outlaw alcoholic beverages in its Constitution. Arrested over 30 times and fined and jailed on multiple occasions, prohibition activist Carrie Nation attempted to enforce the state's ban on alcohol consumption. She walked into saloons, scolding customers, and using her hatchet to destroy bottles of liquor. Nation recruited ladies into the Carrie Nation Prohibition Group, which she also led. While Nation's vigilante techniques were rare, other activists enforced the dry cause by entering saloons, singing, praying, and urging saloonkeepers to stop selling alcohol. Other dry states, especially those in the South, enacted prohibition legislation, as did individual counties within a state.