More work has been done on the supplement. I have made good progress and found a fantastic site: http://english.mapywig.org/Austro-Hungarian.html. This site has Austro-Hungarian military maps. I am able to find many of the battle sites on these maps to get a better idea of what the terrain would look like.
What I lack is any good information on Russian descriptions of small unit actions. Not sure where to even look. Anyone have an idea?