This thesis investigates the role of regional organizations in peacemaking and peacekeeping, particularly on the effects of peace agreement duration. This is important because the United Nations has been traditionally seen as the default international peacekeeping force but recently, more responsibility is being given to regional organizations. This study hypothesizes that regional organizations’ ability to clear commitment problems, create specific agreements, and willingness to enforce agreements make them the most effective third parties to deal with many conflicts. However, the study also hypothesizes that regional organizations are less fit to mediate conflicts based around ethnicity, identity, or religious disparities. By utilizing a mixture of logistic regression and case studies, the results illustrate that regional organizations are an essential asset to creating agreements that elongate the duration of peace. In testing for the partiality of regional organizations, the specifics of agreements made, the willingness and capabilities of enforcement, the reason for the conflict and the institutionalization of the organization, quantitative and qualitative results illustrate that regional organizations are a valid tool for conflict management