Some commentary on youtube:

- They're is different organizations. Naples has the Camorra, Calabria has the N'drengheta and Sicily has the Sicilian Mafia . The Cosa Nostra in America is a blend of all 3 with its own rules

- Yep, and they all migrated to the US in the late 1800s/early 1900s with the Mafia being the dominant group of the three. After they merged to create La Cosa Nostra, the newspapers continued using the term Mafia because they hadn't discovered the new name yet.

- they're similar but not the same. Cosa Nostra was started in 1931 at the end of the Castellammarese war. The Sicilian mafia is a separate organization, similar but different rules and structure. Before the Cosa Nostra was founded the US had the Cammora and Sicilian Mafia operating here , they even had a big war in new york from 1915-1918.