Sexual assault is a crime that devastates victims and has a far-reaching negative impact for The Department of Defense (DOD) because it undermines DOD’s core values, degrades mission readiness, and raises financial costs. DOD developed its strategy to prevent sexual assault using the Centers for Disease Control and Prevention (CDC) framework for effective sexual-violence prevention strategies, but DOD does not link activities to desired outcomes or fully identify risk and protective factors. This book addresses the extent to which DOD developed an effective prevention strategy; implemented activities department-wide and at military installations related to the department’s effort to prevent sexual assault; and developed performance measures to determine the effectiveness of its efforts to prevent sexual assault in the military.