Absolutely. And many can argue without looking like a fool, that the trouble they were having in Chicago (the Aiello/Capone feud) was actually the starting point of the so called Castellammarese war (the Maranzano/Masseria feud). Because when Masseria tried to intercede, in his role as the boss of bosses, in the Chicago feud, Stefano Magaddino (a Buffalo Castellammarese who had close ties to Joe Aiello and who acted as Aiello´s benefactor) advised Aiello not to abide to Masseria´s and Capone´s demands. This in turn forced Masseria to turn to the Schiro Family in NY to set up a meeting with Magaddino. But Schiro (and especially Maranzano, who was a member of the Schiro Family) smelled a rat and turned Masseria down. And this lead to Masseria condemning "all Castellammarese" to death.