This is a beautiful colored map that would no doubt look great on your den wall. I’m a little uncomfortable with the copyright issue — who owns the rights to this image? — but it looks terrific.
http://www.zazzle.com/wwi_map_of_the_american_expeditionary_force_1932_poster-228086377365166287
Here’s another source of maps with the Battle of Cantigny featured. The site has a very detailed description of the battle.