With the title “A better understanding of the Internal Security Architecture of a State as a means to allow NATO planners and commanders to address future threats to peace and security”, this research aims to investigate the field of interaction between police capabilities and the broader security architecture of a given environment, with a specific focus on the layered relationship between formal and informal centers of power. The research objective is, subsequently, to redefine the “policing gap”, and identify a viable analytic/planning tool to understand the Internal Security Architecture. The current chapter elaborates on a first analysis of 21 interviews conducted by the NATO Stability Policing Center of Excellence (NATO SPCoE) and the Royal Netherlands Army - 1CMI command. It provides answers to the study’s key research questions by drawing on the diverse experiences of experts in the field. As a result, it offers valuable insights into the local contexts of the regions where these experts have operated, allowing the identification of lessons learned.