Traditionally, Nordic security arrangements have been characterized by a clear separation between policing and military functions. Today, hybrid threats, expanded preparedness mandates, and intensified crisis management demands are generating new forms of interdependencies among police, military, and civilian defence organizations. These shifts raise important questions concerning policing practices, professional expertise, inter-organizational coordination, legal authority, and accountability under conditions of heightened readiness. We invite empirically grounded and theoretically informed contributions that explore policing, police–military relations, and total defence across individual, organizational, and societal levels.