The end of the Cold War more than two decades ago created new international realities, along with hopes and expectations for greater peace and stability worldwide. Part of that peace dividend was expected to be the result of a decrease in defense spending, with direct consequences for the size and functions of nations’ armed forces. As a result, in parts of the world that benefited from increased security, the changing security challenges and interpretations of what should be considered suitable tasks and roles of armed forces have led to “profound … shifts in their core roles … (which are) … increasingly challenging long-held assumptions about what armed forces are for and how they should be structured and organized”. Governments and societies have been contemplating the appropriateness of newly defined or previously secondary purposes for their armed forces, which extend beyond their core role of national defense. These include the assignment of a variety of external and internal military and civilian roles and tasks. Some of these are performed as a subsidiary activity in support of operations under civilian command. An examination of the internal roles of the armed forces in 15 Western democracies shows that armed forces assist in internal security provision mainly as a resource of last resort when efforts are required to respond to exceptional situations. This is the case primarily during and after natural and humanitarian catastrophes as well as other emergencies that exceed the response capacities of civilian and hybrid security institutions. Under the command and control of civilian agencies, the usually subsidiary operations of the armed forces are designed to enhance the capacity of civilian security providers in such situations