Corleone family

In 1945, Don Vito Corleone declines the business proposal put forth by drug baron Virgil "The Turk" Sollozzo, and this nearly destroys the family. Sollozzo believed Vito's eldest son Sonny wanted to accept the deal, and he had his men gun down Don Vito outside his office. However, Vito survives and is hospitalized. Sonny takes over as acting Don of the Corleone family. After a second assassination attempt on Don Vito, Sonny has Bruno Tattaglia, son of Don Tattaglia, assassinated. The situation escalates further when Don Vito's youngest son Michael murders both Sollozzo and corrupt police officer Captain McCluskey during a meeting in the Bronx, which forces Michael to flee to Sicily. This triggers the Five Families War, during which Sonny is assassinated. After Sonny's death, the still-recuperating Don Vito makes peace with the other families, realizing that his true enemy is Emilio Barzini, who wanted to crush the Corleones to become the most powerful mafia don in New York City.

After Don Vito's semi-retirement, followed by his fatal heart attack, Michael succeeds his father as the Don. Michael carries out Sonny's plan to murder the other New York City Mafia bosses along with Moe Greene, who stood in the way of the family's business interests in Las Vegas, Salvatore Tessio, who betrayed Michael for Barzini, and Carlo Rizzi, who was involved in the murder of Sonny. Following this, Michael moves the family to Lake Tahoe. Michael attempts to legitimize the Corleone business, but is pulled back into crime after a failed attempt on his life by Miami gangster and Corleone business partner, Hyman Roth, attempting to halt the takeover of Las Vegas. Roth is eventually murdered on Michael's orders. Michael's older brother, Fredo Corleone, was ensnared by Roth to conspire against the Corleones. At their mother's funeral, Michael sanctions the assassination of his surviving older brother.

By 1979, most activities of the Corleone family are publicly legitimate. Michael Corleone, having sold their interests in casinos and hotels, invests only in businesses unconnected to the Mafia. Joey Zasa, an underboss in the Corleone's criminal enterprise, is resentful of the reforms. He aligns with aging Sicilian Don Altobello to orchestrate an assassination attempt on Michael during a meeting in Atlantic City, New Jersey.

In 1980, Michael appointed his nephew and Sonny's illegitimate son, Vincent Mancini, to be his successor as Don of the Corleone family, allowing him to change his name to Vincent Corleone. In return for this, Michael ordered him to end his relationship with Michael's daughter (and Vincent's cousin) Mary Corleone. Vincent assured him that he would.

Under Michael's mentoring, Vincent is remade into a new man - wiser, patient, and aware of his status as the new Don. However, he retained a violent streak, as evidenced in his first act as Don. With Michael's tacit blessing, he ordered the deaths of Gilday, Keinszig, and Lucchesi in one mass slaughter. However, Mary was killed in a failed assassination attempt on Michael. Vincent quickly and ruthlessly killed Mosca, the assassin responsible. Despite this, Michael still dies alone and despondent after an unknown period of time.

• 1920–1955 – Vito Corleone – semi-retired in 1954
  • Acting 1945–1946 – Sonny Corleone
  • Acting 1954–1955 – Michael Corleone
• 1955–1980 – Michael Corleone
  • Acting 1958–1959 – Tom Hagen
• 1980–unknown – Vincent Corleone

• 1940–1946 – Sonny Corleone – murdered by Barzini hitmen
• 1947–1954 – Michael Corleone – promoted to Acting Boss in late 1954
• 1955–1959 – Fredo Corleone – figurehead status only, murdered by Al Neri 1959
• 1959–unknown – Albert "Al" Neri

• 1920–1945 – Genco Abbandando – died of cancer
• 1945–1954 – Tom Hagen
• 1954–1955 – Vito Corleone – informal, died in 1955
• 1955–197? – Tom Hagen – date of death unknown
• 197?–1980 – Connie Corleone – informal
• 1980–Unknown – Michael Corleone – retired sometime before 1997

• 1920–1958 – Peter "Fat Pete" Clemenza – heart attack
• 1958–1959 – Frank "Frankie Five Angels" Pentangeli – became informant
• 197?–1979 – Joseph "Joey" Zasa – murdered

• 1920–1955 – Salvatore "Sal" Tessio – murdered
• 1955–1959 – Albert "Al" Neri – by 1958 he was Michael's second in command in Las Vegas, officially promoted to underboss in 1959

• 1933–1940 – Santino "Sonny" Corleone – became underboss

• 1946–1955 – Frederico "Fredo" Corleone – became underboss
• 1955–1959 – Rocco Lampone – killed by law enforcement officers

• c.1930s–1958 – Johnny Ola – close associate of Hyman Roth, murdered