Every city in the US had gangsters. These were people who 'manufactured, sold or/and carried alcohol liquors for beverage purposes' which was illegal during Prohibition.
Tommy GunThe main weapon of the gangsters was the Tommy Gun. It was an early sub-machine gun made by General Thompson in 1920.
Frank Vincent with a Tommy gun in “Chicago Overcoat”.
SpeakeasiesGangsters ran and drank in speakeasies, which were illegal bars that fed the demand for alcohol. Most had a pass word so people could get in. New York had 30,000 speakeasies by 1926.
CadillacGangster cars were based on World War I vehicles. Al Capone had a V8 Cadillac weighing seven tons. Gangsters could fix or bribe various officials who might stand in their way. Big Bill Thomson, the mayor of Chicago, was bribed a lot by the gangsters.
Al Capone's Cadillac