What is Unity of Command

Using macro-, exo-, meso-, and micro-level framework for assessing interdependencies in crisis management system in Poland, this chapter addresses expansion of planning and preparedness to novel hazards and threats such as precipitated mass movements of populations due to environmental changes. The Ukrainian refugee crisis served as backdrop for Poland's crisis management system testing. Benefits of planning and preparedness for mass displacements highlighted (a) an emerging all-hazard approach to crisis management, (b) proactive threat identification and assessment, (c) issuance of acts, laws, and regulations based on novel threats, (d) comprehensive multi-jurisdictional exercises, and (e) increasing importance of mutual aid agreements.