Purpose -The study analysed Supply Chain Network Management (SCNM) in the context of Emergency Preparedness Management (EPM). The study revealed that civil-military relations are essential for EPM to function, as an overall approach to safety and security is responding to complex emergencies and changed threats to developed countries. Civil-military relations are still a concerning problem regarding communication, the exercise of authority and the coordination of Emergency Supplies (ES) to emergency operations. Design/methodology/approach -This qualitative study is based on field observations, with attention focused on the EPM of Sweden, Finland, and Poland. The analysis of a broader SCNM through EPM was supported by semi-structured interviews among civil-military actors in Sweden, information collected from informal conversations known as "hanging out", and secondary materials. Empirically, the analysis included a variety of civil-military relationships and identified implications for management, policy, and planning that are applicable to developed countries. Findings -The management of civil-military relations is a meaningful resource used as an overall approach for safety and security. The integration of civil-military relations in EPM in the planning of ES is a long-standing and a complex matter. The management of Swedish civilmilitary relations in EPM is recognizing that implications for management are imbedded in continuous policy changes in, for example, the Swedish policy history. Civil-military relational complications that arise in the field of operations are impossible to anticipate during emergency planning, as those complications are grounded in policy changes. Conclusions -Escalating threats to developed countries are highlighted. The study underlines the main measures used in studying military involvement in emergency preparedness management. An understanding of SCNM as a choice for management can be obtained in future research that focuses on a broader role of the military in EPM. Sweden has emphasized a clearer role for the military by reactivating Total Defence planning and by evolving common practices and processes with civil actors in Civil Defence. Meanwhile, Poland and Finland are increasing their focus on supporting the management of civil-military policies on safety and security regarding communication, authority and developing coordination. Originality/value-Consistent with findings from previous reports on SCNM, civil-military relations are essential for EPM. This study confirmed the importance of civil-military coordination, the management and practice of authority, and shared forms of communication.