Posttraumatic stress disorder (PTSD) robustly predicts anger and aggression (Olatunji, Ciesielski, & Tolin, 2010), and U.S. Iraq/Afghanistan-era Veterans report that controlling anger and aggressive urges are primary readjustment concerns (Sayer et al, 2010). Trauma-related anger and aggression are associated with functional impairments that significantly limit community reintegration (Rodriguez, Holowka, & Marx, 2012) and that may persist for decades (Koenen et al, 2003). As more troops return from multiple deployments to Iraq and Afghanistan, there is an urgent and growing need for the development and testing of psychosocial treatment for anger and aggression in combat Veterans with PTSD. VA clinicians are doing their best to be responsive to Veteran's needs by offering anger management treatment to Veterans: A survey of clinical practices within the VA found that 35-65% of VA PTSD specialists report providing anger management to their patients (Rosen et al., 2004). Yet to date only one randomized clinical trial (RCT), published in 1997, has investigated the efficacy of treatment of anger and aggression in Veterans with PTSD (Chemtob et al., 1997).