The study is based on a theoretical and clinical model that involves a series of associated risks that are set in motion by exposure to military-related traumatic stressors in Iraq or Afghanistan. Trauma exposure places personnel at risk for PTSD, which in turn increases their risk of problems with anger and hostility, emotion dysregulation and experiential avoidance, and ultimately with alcohol abuse and aggression. The two types of treatments being compared, TARGET (Trauma Affect Regulation: Guide for Education and Therapy) and PE (Prolonged Exposure), are both designed to directly reduce PTSD severity by reducing emotion dysregulation (TARGET) and experiential avoidance (PE), and therefore are hypothesized to reduce the risk and severity of alcohol abuse and aggression- and thereby to reduce associated legal and societal costs.