There is a long story behind this project; the short version is that these figures, formerly on cardboard bases, were painted by my friend Chris Palmer, in the early 1990s.
I added to the project starting in the later '90s. All of my soldiers were mounted on washers to start with.
Some of Chris's later figures were already on washers when I ended up with all of the troops in a trade, but there are about 200 on cardboard. If I'm taking them on the road again, I'd like them interacting with my magnetic boxes.