This book provides an analysis of how penal discourses are used to legitimate post-Cold War military interventions through three main case studies: Kosovo, Iraq and Libya. These cases reveal the operation of diverse modalities of punishment in extending the ambit of international liberal governance. The argument starts from an analysis of these discourses to trace the historical arc in which military interventions have increasingly been launched through reference to both the human rights discourse and humanitarian sentiments, and a desire to punish the perpetrators. The book continues with the analysis of practices involved in the post-intervention phase, looking at the ways in which states have been established as modes of governance (Kosovo), how punitive atmospheres have animated soldiers’ violence in the conduct of war (Iraq), and finally how interventions can expand moral control and a system of devolved surveillance in conjunction with both border control and the engagement of the International Criminal Court (Libya). In all these case, tensions and ambiguities emerge. These practices underscore how punitive intents were present in the expansion of liberal governance, demonstrating how the rhetoric of punishment was useful in legitimating the expansion of the liberal world.