Frank Nitti rose through the ranks of the Chicago Outfit under the tutelage of Al Capone, establishing himself as a fearsome enforcer known for his strategic mind and unwavering loyalty. After Capone’s incarceration, Nitti assumed control of the organization and expanded its criminal operations to include bootlegging, gambling, and various other illicit activities. His ability to maintain order within the outfit while generating substantial profits solidified his position as a formidable force in the criminal underworld.