http://www.historicalsoftware.com/HSC/HSCmilsketch.htm
MILSketch is sketching software that makes it easy to create operational diagrams and order of battle hierarchies. Over 2,500 standard NATO unit symbols, line graphics, and tactical mission graphics are included with the program installation. In addition to creating high quality unit symbols over a map or other background graphic, you can create unit boundaries, text annotations, and freehand lines of many standard types. Probably the greatest benefit of the program is its ease of use.
I dont know if you already know MILSketch, but i think it is very usefull for creating AAR's and stuff.
A quick made example picture:
