For those who don't follow Bob Cordery's 'gaming Blog Wargaming Miscellany, his latest post on a matrix game he designed some years ago is interesting, and something of a tease. The game was focusses on the 1912/13 Balkan Wars.
Just enough here to tease you. Of course the Great War Spearhead rules include a brief series of suggestions on changing a few simple mechanisms to allow for pl;y of battles from this war... now that really IS a tease!!