I have collected lot of graphs and this battle system would be adaptable to all times : ancient times, medieval times, 16th/17th/18th times, 19th century (include Civil war and 1870 war), 1900-1914 times (first fightings in August 1914)
I will do for each campaign generic battles, to allow players to build themselve and quickly the historical battles they want to do (they will juste have to use editor to adapt some details : names, placement, historical reliefs and grounds, etc)