Al Capone was a notorious American gangster who operated during the Prohibition era in the 1920s. His main rival was George 'BUGS' Moran, a Chicago mobster who was involved in bootlegging and other illegal activities. Another rival of Capone's was Eliot NESS, an American law enforcement agent who was famous for leading the group known as 'The Untouchables' in their efforts to bring down Capone. Finally, Frank Nitti was another mobster who was associated with Capone and was his successor after Capone's imprisonment. Als was a nickname for Capone's associate Albert Anselmi.