20mm and/or 1/72nd and/or 1/76th
Scale Creep carries Fantassin
Minutemen carries SHQ
MMS in England makes really nice 20mm white metal vehicles.
15mm/18mm Napoleonics
Age of Glory Miniatures carries Xan figures…look rather nice.
Scale Creep carries Warmodelling Naps
15mm/18mm American Civil War
20mm Moderns
Big honking discussion thread at Lead Adventure Forum
Syrr Hobbs carries Elhiem Moderns.
Under Fire Miniatures-Sculptor for Empress working in 20mm.
The Model Warrior’s excellent article on various manufacturers of 15mm WWII terrain for Normandy.
ArkieGamer 
Comments
I like the out of ammo markers you have. Where did you purchase them? The Acw ones.
Hi Pete,
I use the various reloading poses from the AB range for my infantry low ammo markers, and scarfed ammo box parts from a Blue Moon caisson for the artillery low ammo markers. AB link is first, Blue Moon is second.
http://eurekaminusa.com/collections/american-civil-war
http://www.oldgloryminiatures.com/proddetail.asp?prod=15ACW-089