Posttraumatic stress disorder (PTSD) robustly predicts anger and aggression, and U.S. Iraq/Afghanistan-era combat Veterans report that treatment for anger and aggression is among their top priorities. PTSD-related anger and aggression are associated with profound functional impairments, yet to date there are no empirically-supported treatments for Veterans with PTSD and aggression. Effective group treatment programs could improve functioning and facilitate community reintegration for these Veterans. Given that anger impedes progress in treatment of PTSD symptoms, group anger treatment could also improve Veterans' capacity to benefit from individually-administered empirically-supported therapy for PTSD such as prolonged exposure or cognitive processing therapy.