The Commission (mafia)
After Maranzano's murder in 1931, the Mafia families called a meeting in Chicago. The purpose of the meeting was to replace the old Sicilian Mafia regime of "boss of all bosses" and establish a rule of consensus among the crime families. Charlie Luciano established a Mafia board of directors to be known as "The Commission" to oversee all Mafia activities in the United States and serve to mediate conflicts between families. The Commission consisted of seven family bosses: the leaders of New York's Five Families: Charlie "Lucky" Luciano, Vincent Mangano, Tommy Gagliano, Joseph Bonanno, and Joe Profaci; Chicago Outfit boss Al Capone; and Buffalo family boss Stefano Magaddino. Charlie Luciano was appointed chairman of the Commission. The Commission agreed to hold meetings every five years or when they needed to discuss family problems.
Bugs Moran
Among the involved gangs were Dean O'Banion and his mostly Irish group, including Bugs Moran, who became known as the North Side Gang and Al Capone as the leader of the Italian mob on the South Side. These two rivals fought violently, resulting in what is known as "The Bootleg Battle of the Marne."