Most of that stuff is vaguely touched upon since there's another 400 page book comming out just about the countries and peoples.
It takes place on a small part of a contenit, about the size of Europe, where people don't realy have the boat tech to traverse the seas, so they're kinda stuck where they are.
There's a russian country, westren europe country, barbarian highlands ect. From the small part they included in this book I can tell you that it's better the the Realms, but I don't care for the Realms much anyway. The setting is more strickt then standard DnD books, you wount be useing Monster Manuel 2 or 3 with it, nor the planer handbook (there are no planes of existances). Basicaly only things that would "fit" in with their setting are ok from different books, which is nice since it gets rid of all the clutter that you have with other settings.
The Tech is mixed, the military is more advanced, but there are things that everyday people know about or might own. As I've said several times it a mix of Victorian and Wild west, so no there are no radios, cars,
etc, though one my find a toaster. There are automated items, so it would be plauseable to have a very simple car or the like, but it would be a very rare and wonderious thing.
And yes, the wargame and the RPG are connected. The RGP came first the the Wargame (there were Iron Kingdoms adventures years ago with out any setting books). While they are realated the 2 products have different people working on them and you'll find that the miniature game and RPG may not allwayse mix when it comes to setting.