Impressed by Bonaparte at Marengo (BaM), I just picked up a copy of Simmons Games latest release, Napoleon's Triumph (NT) from Gameslore. NT is a development of the BaM system for the Battle of Austerlitz. The board is nearly 3' x 4'!
As with BaM, NT divides the map into polygons with defined "approaches" which restrict combat and/or movement. It also uses a diceless combat system and hidden unit strengths but now adds leaders.
I am really looking forward to giving this one a go!