Las guerras modernas

It's a game similar to chess and checkers, the background is the first world war, german versus french.
Each side has four different units: infantry (one move to front or side) , cavalry (one diagonal move, like checkers game), cannons (like towers in chess) and planes/zeppelins (like queens in chess).
There is a special unit, the standar-bearer, if you capture the enemy standar-bearer with one infantry or cavalry unit, your unit change to a cannon unit.
The board is divided by a river in the middle, the infantry and cavalry units cannot retreat until overpass the river.
The objetive to win is eliminate all the enemy units.