Initial ideas for game map: Great War

This is an initial idea for a game map, for the period of time right after America's entry into WW I. I would want to keep the game play fairly simple and the units easy to understand and identify by the use of the flags. I would need to also include icons to indicate whether a unit is infantry, artillery, tank, or medical.

This is a trace of a map I found at worldwar1letters.wordpress.com/.../ map-room/

I modified it using Gimp and used flags I found on Google Image and shrunk down.