Marsh); Comitato Internazionale per lo Sviluppo dei Popoli (CISP) Somalia ( Desgroppes, Kaburu); UNICEF Somalia ( Read-Hamilton) "[C]arefully designed, community engaged, multipronged interventions that target social norms underpinning GBV and catalyse community-led mobilisation efforts may over time change harmful norms and foster norms that promote gender equality" Women and girls are vulnerable to violence across their lifespan, especially during conflict and other humanitarian emergencies. Often, they do not disclose gender-based violence (GBV) to healthcare and other service providers because of social norms that blame the woman or girl for the assault, norms that prioritise protecting family honour over safety of the survivor and community, and institutional acceptance of GBV as a normal and expected part of displacement and conflict. These harmful beliefs and social norms may also serve to cause secondary traumatisation to survivors. Thus, the United Nations Children's Fund (UNICEF) used a social norms approach to develop the Communities Care Program: Transforming Lives and Preventing Violence. Communities Care (hereafter, CCP) is based on the understanding that, even within challenging humanitarian settings, there is an opportunity for positive change in social norms to support gender equality and the adoption of behaviours and actions that can prevent GBV. This paper presents findings from the evaluation of the initial implementation of CCP in Mogadishu, Somalia, which has experienced decades of conflict and ongoing emergencies including drought, famine, and a large number of internally displaced people (IDPs).