Beyond angry, the crew whips into action. They go to the Bulls and get them to donate some of the weapons they stole.
They get a pickup from Stan and turn it into an armored vehicle with steel plate armor and a mounted heavy machine gun in the back. They also find out that the H Boys headquarters had been haunted in the past and they break into a Catholic warehouse and steal the spirit urn with the poltergeist.
They then launch what will go down as one of the most spectacular gang attacks in Chicago history. Tommy, Sean and Jesse pull up front and lay into their headquarters with heavy machine gun fire and hand grenades while Charlie slips into the basement and releases the poltergeist.
The results were devastating and the Halsted Boys were eliminated. Deciding not to let left over ammo go to waste, they made sure to go do some damage to the Bishop St. Greasers garage as well. Making them pay for their alliance to the H Boys and being a general pain in the ass in the neighborhood.