The "Gangster Era," primarily during the 1920s and early 1930s in the United States, was marked by the rise of organized crime. This period coincided with the implementation of Prohibition, which banned the sale of alcohol. Criminal organizations, led by figures like Al Capone, capitalized on the demand for illegal liquor, leading to increased violence and corruption. During this time, cities like Chicago became notorious for gang-related activities, including bootlegging and gambling. Law enforcement struggled to combat these powerful gangs, which often had connections to politicians and law enforcement. The era ended with the repeal of Prohibition in 1933, significantly diminishing the power of organized crime.