Internal and external security are traditionally considered to be distinct concepts that allow police organizations and tasks to be differentiated from those of the military. Internal security is then viewed as oriented towards the maintenance of the order within a state and to be exercised against fellow citizens with a limited use of violence. External security deals with the protection of the territory and is exercised against foreign enemies, may include the use of excessive violence. In practice, however, the boundaries between these concepts and between police and military aims and tasks have become blurred. The extension of the security concept, a change in the nature of interventions on foreign territory and a shifting image of the enemy create an overlap between internal and external security issues and actors. This evolution seriously challenges the existing legal and normative frameworks that rely heavily on assumptions based on the distinction between internal and external security.