Missouri would be the newbie versions of any of them. I would recommend Civil War: Campaign Virginia and Diplomacy: Blood and Iron. They are the best, in my opinion. Blood and Iron is much better when you are playing with your friends, diplomacy is more of a factor.
I think attachments are broken, so I can't give you my maps, though.
Also, try Bull Run... Personally I don't like Campaign Virginia #2, but you might..
I don't have the maps on this computer, but when I hook up the good one I should have them. I'm not sure yet, because I got a new HDD and they said they transferred all the files.