Peacekeeping helps to prevent conflict and to protect civilians. But how does it work to achieve those aims? Notwithstanding a growing recognition that peacekeeping mandates alone do not directly determine what actually happens in the field, we still know little about how-once deployed-military units translate an ambiguous mandate into action. In this paper, we focus on one dimension of peacekeepers’ behavior that has become increasingly important, namely, how peacekeepers relate to other military units with whom they are supposed to implement their mandate. We systematically document how mandate interpretations emerge and how they influence peacekeepers’ understanding of other troops they work with. Central to this is peacekeepers’ meaning making, a concept we borrow from the sociological literature, which refers to the common and human process through which individuals give meaning to their surrounding context. Drawing on nearly 120 interviews with peacekeepers deployed to the United Nations (UN) mission in Mali (2014-2019), we identify three different ways by which peacekeepers interpret their mandate and interact with other contingents: Voltaire’s garden; building bridges; and othering. Acknowledging peacekeepers’ agency and the social dimension of peacekeeping has important implications for both scholarly and policy debates.