Salvatore Maranzano is a powerful New York City mob boss. He is at war with Joe "The Boss" Masseria for control over mafia operations in the city and to claim the position as "Boss of all bosses".
In season 5 episode 7 Nucky makes a deal with Lucky to kill Maranzano in exchange for his nephew, Will.
Maranzano, along with his staff, is killed by Eli Thompson. The men use knives to stab him several times and Eli shoots him once in the head once he is on the ground.
As he lay dying on the ground his final words were, "wiles is waste"
Hailing from Castellammare Del Golfo, Sicily, he arrives in America just shortly after World War 1.