Community-based prevention strategies (e.g. bystander programs) have the potential to reduce sexual violence against women, but have mainly been implemented in high-income countries and geared towards specific contexts, such as university campuses. Based on local priorities for sexual violence prevention, a community-informed bystander intervention training program, “El que ve y ayuda” (“Who Sees and Helps;” WSH), was developed in Ayacucho, Peru: a post-conflict community.