This dissertation explores multilateral sanctions as conflict resolution tools. Conflict resolution is not only resolution per se but also conflict prevention, management, and transformation. Thus, each of the three papers presented in this dissertation studies multilateral sanctions within one of many aspects through which a conflict resolution tool could be seen, investigated, and used. The first paper investigates sanctions as a strategic conflict resolution tool by building a model to explain the factors associated with the United Nations Security Council's use of sanctions. The second paper investigates regional organizations and their commitments, systems, and sanctions practices against unconstitutional changes of government, most notably coups. The third paper brings back the discussion to the United Nations Security Council by looking at the effectiveness of sanctions on constraining and signalling when dealing with intra-State armed conflicts. This dissertation contributes to the sanction's literature first and foremost and the broader field of conflict and peace studies.