Anyway, apropos of not much, I found a good refresher essay here. And this factoid leaped out:
...in modern armies the soldier does not own his weapons, whereas in ancient armies he did . For example, in ancient Rome when the army was called together the 'classes' were expected to come equipped to a certain standard at their own expense - 'classification' was a form of taxation. Soldiers were expected to bring money to buy food from the locals (when they did not take what they wanted by force); they got no pay or provisions.