I think the title of the thread really should be "Libertarians make you stupid"

Once again I can't understand why you insist on making up strange, imaginary situations(straw men) and claiming them to be what Libertarians stand for or what the result of a free society might be. Perhaps you are so steeped in totalitarianism that you cannot think clearly about freedom.
Here, Logan, is the unfathomably difficult answer to the conundrum you have presented:
When a soldier volunteers for Military Service he volunteers to charge into that hail of bullets if such is required, which meets your personal requirement that:
if we had a volunteer army and a bunch of guys volunteered to charge into a hail of bullets, that would be okay.

In reality our soldiers are suppose to create that hail of bullets, not charge into it wink

Good coffee, good weed, and time on my hands...