The best series was the 'US Army In Action' series - you saw those on the walls of every Army unit, and they were fairly large in size.
They were the action paintings that ran from the Revolutionary War through Vietnam - and coupled with the National Guard's version of the same - make up an impressive gallery.
There were a couple of versions of certain ones, as well - the original-as-painted one, and the later politically-correct one.
I own the former.
Scouts Out!