 In western militaries, a joint force is defined as a unit or formation comprising representation of combat power from two or more branches of the military.Gendarmeries, including equivalents such as Internal Troops, Paramilitary Forces and similar, are an internal security service common in most of the world, but uncommon in Anglo-Saxon countries where civil police are employed to enforce the law, and there are tight restrictions on how the armed forces may be used to assist.It is common, at least in the European and North American militaries, to refer to the building blocks of a military as commands, formations, and units.