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The 18th Amendment of the US Bill of rights was ratified, prhoibiting the making and distribution of alcohol in the United States.
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Dean O'Banion is murdered by members of Capone's gang, and Bugs Moran steps in to take his place as head of the north side gang.
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John Torrio retires, and leaved Al Capone in charge of Chicago's largest crime syndicate.
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Charles Luciano (born Salvatore Lucania) is captured by lackies of Joe Masseria, and is tortured. He survives and is given the nickname "Lucky".
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Members of Al Capones gang disguised themselves as police and murdered members of Bugs Moran's gang.
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Luciano made a power move. He invited Masseria to dinner, and whilst walking into the bathroom four gunmen emerged and shot Masseria.
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To finish his rise to power, Luciano ordered the death of Salvatore Maranzano, head of all crime families in New York.
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Luciano abolished the "Capo Di Tutti Capi" (boss of all bosses), an set up the commission. He spread the power of the crime families equally among five bosses, who headed the five families.
