[quote=@rezay]
They're [b]very[/b] well treated 100 year old revolvers. Almost never fired, there weren't many situations like that that arose in the bunkers (not the ones that made it to the days of New Jericho, at least. Using lethal weaponry on people in such a small community is likely to stir up an awful lot of trouble). They're also highly corrosion-resistant, being made in a society advanced enough for the megacities the size of what we see on the map
[/quote]

Not fired =/= well maintained.
You still need oiling and replacement parts and regular cleaning which I admit you could probably manage in a peaceful bunker.

[quote=@rezay]
Yes, I suppose most people are shanty-towns. But for guns to be put to their best use, they have to be made en-masse, their biggest advantage being you don't need to train for a decade and a half to use one competently. Also, you need the population to field large armies, which NJ doesn't have, being a shantytown. 
[/quote]

You don't need an army of 500 people to go raid and attack other people. "War" on this scale is more akin to raiding and large skirmishes. If you have these super well kept modern revolvers, you don't need to field them en masse since they'd be accurate enough to hit things from a long way away unlike the pipe muskets most people would likely end up making at first. 

Although I do have an interesting question regarding population growth [@AdorableSaucer], how would we get large population growths? Do we just assume there's a population of teenagers just waiting to become adults the next turn? Or will their be opportunities to vassalize/incorporate NPC factions into our own or like, accepting migrants.

[hr][quote=@rezay]
<Snipped quote by Dog>

Yes, very important. I imagine a lot of it is self explanatory/ingrained into human nature, but some finer points will take some time to relearn. Interesting story potential. Logistics especially will be hard. 

*I don't imagine ALL books/sources were lost, necessarily. There's probably some of that still sitting around, will have to verify with the GM though [/quote]

Humans are good at killing each other, not necessarily good at doing war though. You have to remember, we think some things as obvious because we have hindsight and a wealth of knowledge available to us. Line formations was once considered revolutionary and pulling off maneuvers like hit and run, bait and switch or even flanking can be surprisingly difficult. Part of modern military training is specifically designed to teach soldiers how to do battle beyond "shoot that dude".

Also books can start to look like shit after one year of mishandling. Books being mistreated for a hundred years well... unless you have some very dedicated librarians and book keepers, you probably are going to be missing a lot of pages.