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Chicago, Illinois, has a long history of organized crime and was famously home to the American mafia figure Al Capone. This article contains a list of major events related to organized crime.
Alphonse Gabriel Capone, sometimes known by the nickname "Scarface", was an American gangster and businessman who attained notoriety during the Prohibition era as the co-founder and boss of the Chicago Outfit from 1925 to 1931. His seven-year reign as a crime boss ended when he went to prison at the age of 33.
The National Crime Syndicate was a multi-ethnic, closely connected, American confederation of several criminal organizations. It mostly consisted of and was led by the closely interconnected Italian American Mafia and Jewish Mob. It also involved, to a lesser extent, other ethnic criminal organizations such as the Irish Mob and African-American crime groups. Hundreds of murders were committed by Murder, Inc. on behalf of the National Crime Syndicate during the 1930s and 1940s.
John Donato Torrio was an Italian-American mobster who helped build the Chicago Outfit in the 1920s later inherited by his protégé Al Capone. Torrio proposed a National Crime Syndicate in the 1930s and later became an adviser to Lucky Luciano and his Luciano crime family.
Frank Ralph Nitto, known as Frank Nitti, was an Italian-American organized crime figure based in Chicago. Bodyguard of Al Capone, Nitti was in charge of all money flowing through the operation. Nitti later succeeded Capone as acting boss of the Chicago Outfit.
Vincenzo Colosimo, known as James "Big Jim" Colosimo or as "Diamond Jim", was an Italian-American Mafia crime boss who emigrated from Calabria, Italy, in 1895 and built a criminal empire in Chicago based on prostitution, gambling and racketeering. He gained power through petty crime and heading a chain of brothels. From 1902 until his death in 1920, he led a gang known after his death as the Chicago Outfit. Colosimo was assassinated on May 11, 1920, and no one was ever charged with his murder. Johnny Torrio, an enforcer whom Colosimo imported in 1909 from New York, seized control of Colosimo's businesses after his death. Al Capone, a close associate of Torrio, has been accused of involvement in Colosimo's murder but was not yet in Chicago at the time.
Anthony Joseph Accardo, also known as "Joe Batters" and "Big Tuna", was an American longtime mobster. In a criminal career that spanned eight decades, he rose from small-time hoodlum to the position of day-to-day boss of the Chicago Outfit in 1947, to ultimately becoming the power behind the throne in the Outfit by 1972. Accardo moved the Outfit into new operations and territories, significantly increasing its power and wealth during his tenure as boss.
Paul De Lucia, known as Paul Ricca, was an Italian-American mobster who served as the nominal or de facto leader of the Chicago Outfit for 40 years. In 1958 he was named "the country's most important criminal" by a Senate crime investigating subcommittee. Ricca died on October 11, 1972.
The Chicago Outfit is an Italian-American Mafia crime family based in Chicago, Illinois, which originated in the city's South Side in 1910. The organization is part of the larger Italian-American Mafia.
The Valley Gang was an Irish-American street gang in Chicago, Illinois during the early 20th century, which ultimately made the transition to organized crime and became a de facto extension of the Chicago Outfit under Al Capone.
The North Side Gang, also known as the North Side Mob, was an Irish-American criminal organization within Chicago during the Prohibition era from the early 1920s to the mid-1930s. It was the principal rival of the South Side Gang, also known as the Chicago Outfit, the crime syndicate of Italian-Americans Johnny Torrio and Al Capone.
Felix Anthony "Milwaukee Phil" Alderisio was an American enforcer, bagman, hitman and burglar for the Chicago Outfit. He was underboss to Sam Giancana during the 1960s and boss from 1967 to his imprisonment in 1969.
Gus Alex was an American mobster affiliated with the Chicago Outfit, who succeeded Jake Guzik and Murray Humphreys as the Outfit's main political briber and "fixer".
Salvatore Joseph "Sam" Battaglia was an American mobster and high-level member of the Chicago Outfit criminal organization.
Louis "Little New York" Campagna was an American gangster and mobster and a high-ranking member of the Chicago Outfit for over three decades.
William Daddano Sr., also known as "William Russo" and "Willie Potatoes," was a top enforcer and loan shark for the Chicago Outfit and a participant in some high-profile robberies.
Joseph Esposito was an American politician best known for his involvement in bootlegging, extortion, prostitution and labor racketeering in Chicago, Illinois during the Prohibition era.
Marshall Joseph Caifano was an Italian-American mobster who became a high-ranking member of the Chicago Outfit in Las Vegas.
Antonio "Tony the Scourge" Lombardo was an Italian-born American mobster. He was consigliere to Al Capone, and later the President of the Unione Siciliana.
Walter Stevens (1877–1931) was a freelance enforcer and "hitman", popularly known as "dean of the Chicago gunmen", during Prohibition. Although having the reputation of a violent gangster, credited with the deaths of at least 60 men, Stevens was a devoted husband to an invalid wife and his three adopted children. Stevens was uncharacteristically cultured compared to his fellow gangsters, refraining from drinking and reportedly quoting classical literature from authors such as Robert Louis Stevenson and poet Robert Burns.
Salvatore "Mooney" Giancana was an American mobster who was boss of the Chicago Outfit from 1957 to 1966.