Military chaplains (MCs) play a vital role in sustaining the spiritual, moral,and existential well-being of armed forces personnel, yet their structures and practicesdiffer widely across NATO nations. Through a comparative case study of Sweden andBelgium, this paper examines the challenges and opportunities of MC interoperability,showing how state-church and pluralist models reflect distinct historical, cultural, andorganizational frameworks.
Using NATO’s four interoperability dimensions – technical, procedural, operational,and human – the study identifies key barriers, including divergent legal systems, doc-trinal variations, operational differences, and linguistic-cultural complexities. Thefindings underscore the multitude of challenges associated with achieving interoperability in a NATO context. They also reveal that cross-national cooperation remainsconstrained by deeply embedded societal, cultural, and military organizational dis-parities. The practical implications of the study suggest that interoperability efforts maybe most feasible among countries with strong cultural and historical overlap, whereshared traditions and mutual recognition provide a foundation for practical collaboration. Much more research is needed, as MC interoperability is a highly complex subjectin which the pathways for cooperation remain highly uncertain.