@Midnight_Reaper There was a group of pieces made by pewtercraft each had their rules with them for use with axis and allies from that time period of MB. not sure if the rules can be found anymore and pewtercraft has been done for a while. The ones I currently have.
Anti tank guns
Mechanized infintry (this is in game now)
Troop Trains (versions of this are now in game)
Scorched earth ruins
Some of the ideas are good if they are tweaked a bit.