Child Frontiers is developing a thematic brief for Girls Not Brides (GNB) on evidence-based child protection approaches to prevent and respond to child marriage. GNB is a global partnership of more than 1400 civil society organizations from over 100 countries committed to ending child marriage and enabling girls to fulfil their full potential. This thematic brief will complement other sector focused briefs being developed by GNB including child marriage within the education sector. The purpose of this assignment is to increase understanding of how child protection investments at the national and community level can accelerate action to end child marriage, and highlight the important role civil society can play to strengthen child protections systems. The primary audience members for this brief are the Girls Not Brides’ civil society organizations.