Aggression can have devastating interpersonal and societal consequences, including incarceration, family violence, disruption of social support, and death. Veterans and service members with posttraumatic stress disorder (PTSD) have higher rates of impulsive aggression, characterized as emotionally charged, reactive, and difficult to control, compared to veterans and service members without PTSD. Impulsive aggression is not targeted through traditional evidence-based psychotherapies (EBP) for PTSD. Emotion regulation ability is a key factor in reducing impulsive aggression. Our team developed a 3-session emotion regulation treatment (Manage Emotions to Reduce Aggression; MERA) to help veterans and service members reduce aggression. This training will introduce the adaptive value of emotions, including anger, sadness, disgust, happiness, and fear. Then it will teach providers have to deliver the brief intervention, MERA, which has demonstrated reductions in aggressive behavior.