Jan Fischer, American Soldier In His Military Life

The relationship between the military and the society it serves is a complicated and ever-evolving one. Much depends on the nature of the society itself and whether it sees the military as important, as for example in time of threat or war, or a burdensome expense typified by defence cuts in time of peace.
These relationships are seen from the perspective of political-military relations, the military-industrial complex, and the socio-military relationship. The last can be divided between those segments of society that offer support for the military, those who voice opposition to the military, the voluntary and involuntary civilians in the military forces, the populations of civilians in a combat zone, and of course the military's self-perception.
Militaries often function as societies within societies, by having their own military communities, economies, education, medicine and other aspects of a functioning civilian society. Although a "military" is not limited to nations in of itself as many private military companies (or PMC's) can be used or "hired" by organisations and figures as security, escort, or other means of protection where police, agencies, or militaries are absent or not trusted.