A considerable amount of research within security studies has explored the military's increasingly diverse and multifaceted tasks. However, this debate has been disconnected from the literature on civil-military relations to the effect that we still lack knowledge about how and why these operational tasks have consequences for the relations between the armed forces, civilian authorities, and society at large. In order to provide for a better understanding of these effects, this introduction to the Special Issue debates the concept of operational experiences to capture how the military's routine activities affect the equilibria, logics, and mechanisms of civil-military relations. The article then provides an overview of the Special Issue's six contributions, whose diverse and global perspectives shed light on different aspects of the relationship between military missions and the military's roles in society and politics. Among other factors, they highlight role conceptions – the military's shared views on the purpose of the institution – as crucial in shaping the dynamic relation between what the military does and what place it occupies within the state and society. The article concludes by describing potentially fruitful areas of future research.

Latin American militaries are today in many regards inoperative and obsolete as an instrument of defence. Yet, they seek to maintain their organisational power and privileges. Governments, on the other hand, lack the adequate means to fight criminality, persisting poverty and social inequality. In an apparent win-win situation, Latin American governments have used the military as a wildcard to step in where civilian state capacity falls short, including for urban and border patrols, literacy campaigns and to collect garbage, among many other tasks. The military's manifold internal use has been defended mainly based on pragmatic reasons. We argue instead that the ostensive pareto optimality between militaries and governments has had negative effects for civil-military relations from a democratic governance point of view that takes into consideration the efficiency and effectiveness of how the state delivers basic services across different policy areas.

This paper contributes to current debates on the politicization of international politics by examining party-political contestation of peace and security missions. It is guided by two inter-related questions, (a) to what extent deployment decisions are contested amongst political parties and (b) what drives such contestation. We examine data from a new data set on parliamentary votes on deployment decisions in France, Germany, Spain, and the United Kingdom and from the Chapel Hill Expert Survey. Against conventional wisdom and in an effort to address the often-overlooked role of political parties, we find that military deployments have been systematically contested amongst political parties across Europe. Further, we find that contestation is driven by the left/right axis, as opposed to newer cleavages captured here by the so-called gal/tan axis. We also find evidence that patterns of contestation depend on parties’ positions in government or opposition, a factor we relate to bureaucratic and international pressures on the parties in office, and to political opportunities for opposition parties.