Michael was born on March 23, 1920. To Sicilian immigrant, Don Vito Corleone and his wife Carmela. Michael has two older brothers, Sonny and Fredo, with a younger sister, Connie. Michael was a Marine Corps veteran who served in World War II. Corleone was the New big boss of The Corleone Mob. serious, blunt, and quiet. He was cold to everyone, excluding his wife. he would do anything for her, extremely protective and loving, yet not shown publicly.