In my recent mapping challenge I marked the camps with glyphs meant to destinguish one army from the other. Both sets of glyph where taken from http://www.omniglot.com/

and flipped either horrizontally or vertically and or rotated 90 degrees.

it a good way to get quick symbold. Or even just as a first step for a set of your own symbols based on their styles.

thought some might be intrested in using this site for many uses.