What do you call glyphs representing kills painted on a weapon or vehicle?
Solution 1:
These "glyphs" are called kill markings. I couldn't find a good definition anywhere, but I did find numerous references on Google. The most source worthy is a captioned photo of a 1942 fighter plane.
This post from an aviation forum discusses whether or not "kill markings" were seen on WWI fighter planes.
In my research, I also found some reference to the glyphs as "victory markings," but this usage seems less widespread than "kill markings."