The Irish gang were a group of Irish criminals from Hell's Kitchen. In 1933, the O'Rourke brothers attempt to assassinate Luca Brasi, the plan is abandoned when Brasi and his gang arrive together however Willie decides to still attempt to kill Brasi but only wounds two of Brasi's men. this leads to Brasi murdering three of Tomasino Cinquemani's men before learning the Irish were responsible after the Irish raid the Brasi gangs gambling den. Brasi retaliates by blinding Donnie and killing Willie.