i disagree, rice boy, i think this is a fair question, and certainly the kind of question that makes sense on this kind of website.
(i don't know that the history in the final paragraph makes much sense, as i understand it, but that is more or less irrelevant to the gist of the question.)
the questions of a) how to transform or address material things and relationships that are not appropriate to a new situation, and b) how localized it would be possible for a dramatic change to be, are both practical, reasonable questions, i think.
and the truth is that the anarchists i know don't think much along those lines. we see the possibility of real change (of the sort we want) as being so distant that the practical problem-solving asked for by this question is irrelevant, or a distraction from current concerns (or, at worst, a bad faith attack).
we do have the spanish revolutionary war as evidence that people who are fighting for their homes and friends do not require a military hierarchy to be effective fighters.
i'm not sure of the point of the first part of your question, about troops and arms. obviously troops are people, and in this case people with a particular skill set that would (in the scenario you're talking about) still be useful. are you wondering if the troops would be killed and the weapons destroyed? why would we kill people who weren't trying to kill us? what level of weapons are you talking about? if WMD then i can imagine some kind of deconstruction attempt, because that level of destruction is never appropriate... and perhaps the things they're made from would be useful in some other context...
so that's what i've got for you. if i haven't understood, perhaps you will clarify.