The first batch are from what I believe was a Weird War I or II game whose table was chock-full of interesting terrain and machines ... Some neat bi-planes, a windmill, mobile German cannon, towers, a graveyard, and assorted soldiers positioned in rocky hills and hiding in cover...
There was a cool Napoleonic era game where the cloud of musket fire (represented by swabs of cotton) contained flashing yellow LED lights, which neatly simulated the effects of muzzle flashes.
American Civil War Gnomes riding ponies through the desert in a Gnome Wars skirmish. I gotta say, I love the ACW gnomie cavalry. I'm not sure if the Island Native Gnomes they used for this game were scratch built or an upcoming release from Brigade, but they were really cool-looking, face-painted headhunters.
Some ACW action in the cornfields. This picture doesn't really do the table any justice.