Under what conditions can faith leaders influence peace in civil wars? The ongoing conflict in Congo, Syria, and Yemen indicate that faith leaders can fuel sectarian divide, but also intervene on the side of peace. Drawing on experiences in Sierra Leone's civil war, this paper highlights the role of faith leaders as moral guarantors of peace processes, with respondent former rebels indicating that without interfaith delegations personally bringing the peace accord to their remote jungle camps, they would not have trusted the UN-led process. Ethnographic analysis and over 60 field interviews with former combatants and religious leaders, presents a model for answering why faith leaders were central in terminating this conflict. Combatant's personal experience with a diverse mixture of Christian, Traditional, and Islamic leaders contributed to high confidence in peace accords, due to interfaith practices deeply embedded within the culture and shows the dispositions, rituals, and interfaith practices that provided the cultural foundations for successful interfaith intervention. The paper ends with generalizations for other interfaith groups seeking to intervene in conflict.