Chapter 3 lays out the methods and the logic of case selection that underpin the book. This book is a theory-building and theory-probing undertaking—I build a theory of how the alternative benefits of bargaining lead combatants to seek out UN peacekeeper while probing how the credible commitment theory of war termination drives the desire for peace operations—and process tracing using a most-similar cases approach is one way to do this.In this chapter, I outline first the method by which I selected cases, building a catalogue of the UN’s peacekeeping successes and failures, and a timeline of what peacekeeping successes and failures combatants would have seen around the world as they were negotiating, in order to do so, and then discuss the evidence and tools I use to process-trace the Rwandan and Guatemalan peace processes. Readers who are interested primarily in the substance of the text and not in methodological discussion, or a discussion of multiple archives, can proceed to the subsequent three chapters without reading Chapter 3.

Chapter 4 examines the conflict resolution processes surrounding the 1990-1994 civil war in Rwanda; what effect the UN’s past performance had on the Rwandan peace process; how peacekeeping failures in Somalia and Burundi may have shaped the conflict in the crucial months between the Arusha Accords and the genocide; and what led the Rwandan Patriotic Front (RPF) to invite a second UN peace operation into Rwanda following the first mission’s cataclysmic failure. Drawing on archival material and interviews, I argue the negotiating table at Arusha was populated by desperate negotiators who had to settle because they could no longer fight; by hardliners who used the negotiation process to pursue tactical, distributional, and symbolic goals other than peace; and by spoilers who ultimately strove to break the peace. In this context, the international community’s unique abilities to assist in demobilization and refugee resettlement, and their ability to confer legitimacy upon political groups, were important dimensions of negotiations. In the turbulent aftermath of genocide, amidst massive population transfers and the RPF’s consolidation of power, the RPF’s desire to be viewed as legitimately pursuing post-conflict peace, rather than exacting retribution on political opponents, was a key reason to seek out UN assistance.