[Urbane Guerrilla]

Depends on just how necessary you think a cross-border enforcement arm really is.

Libertarian though I am, I think an army is still a necessity, particularly as long as anyone else out there does too. It's analogous to a deer's antlers: they have an appreciable metabolic cost to the rest of the deer, but they are a protection to the integrity of the rest of the body. In this, an army's societal function is most like that of the police. Either sees use in restoring order, regardless of who or what might disturb it nor how much. Where an army differs from a police force is that it transfers destruction, from its home precincts to foreign areas. Police forces are not constituted to do that.