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the beginning of what is known as the Gangster Era, a time that roughly spans from 1919 until 1933 when Prohibition was repealed.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
The Eighteenth Amendment was repealed on December 5, 1933, with ratification of the Twenty-first Amendment to the U.S. Constitution. Despite the efforts of Heber J. Grant, president of The Church of Jesus Christ of Latter-day Saints, the 21 Utah members of the constitutional convention voted unanimously on that day to ratify the Twenty-first Amendment, making Utah the 36th state to do so, and putting the repeal of the Eighteenth Amendment over the top in needed voting.