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the beginning of what is known as the Gangster Era, a time that roughly spans from 1919 until 1933 when Prohibition was repealed.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.
Alcohol law
In the United States, there was an attempt from 1919 to 1933 to eliminate the drinking of alcoholic beverages by means of a national prohibition of their manufacture and sale. This period became known as the "Prohibition era". During this time, the 18th Amendment to the Constitution of the United States made the manufacture, sale, and transportation of alcoholic beverages illegal throughout the United States.