List of Bosses killed in Sicilian and American Mafia

Pre-Commission

October 21, 1905 - Tommaso "The Ox" Petto (Bufalino)
November 24, 1913 — Vito Adamo (Detroit)
September 7, 1916 - Nicholas "Nick Morello" Terranova (Genovese)
January 3, 1919 - Antonio "Tony" Gianola (Detroit)
September 24, 1919 - Gregorio Conti (Pittsburgh)
October 2, 1919 - Salvatore "Sam" Gianola (Detroit)
May 11, 1920 - Vincenzo Colosimo (Chicago)
September 28, 1921 - Giovanni "John" Vitale (Detroit)
October 13, 1927 - Joseph Lonardo (Cleveland)
October 10, 1928 - Salvatore "Toto" D'Aquila (Gambino)
June 11, 1929 - Salvatore Todaro (Cleveland)
August 6, 1929 - Stefano Monastero (Pittsburgh)
February 14, 1930 - Salvatore "Singing Sam" Catalanotte (Detroit)
February 26, 1930 - Gaetano "Tommy" Reina (Lucchese)
June 1, 1930 - Gaspar "The Peacemaker" Milazzo (Detroit)
July 5, 1930 - Joseph "Big Joe" Porrello (Cleveland)
July 10, 1934 - John Lazia (Kansas City)
September 5, 1930 - Bonaventura "Joseph" Pinzolo
February 7, 1931 - Cesare Lamare (Detroit)
April 15, 1931 - Giuseppe "Joe the Boss" Masseria (Genovese)
September 10, 1931 - Salvatore Maranzano (Bonanno)