Since the 1990s, United Nations (UN) peacekeepers have been engaged in multidimensional activities in conflict-affected countries. The existing literature, however, focuses predominantly on the effectiveness of military and police peacekeepers involving the threat of force, and does not shed light on the effectiveness of civilian peacekeepers despite the latter's crucial role in rebuilding local livelihoods and restoring state institutions. Civilian participation in peacekeeping increases both the benefits of peaceful life and the costs of combat. Further, civilian activities, by strengthening the rule of law and political accountability mechanism, contribute to encouraging both the rebels and government to disengage from further violence. Using the original dataset of financial resources for UN peacekeeping operations in the world, from 1988 to 2019, I test hypotheses regarding the impact of civilian expenditures on battle-related deaths. Regression analysis shows that spending on the civilian component in UN peacekeeping reduces battle-related deaths on the government side inflicted by insurgents.