Here’s a variant of Warhammer Ancient Battles for the American Revolution. No. Really. It could work.
Lord of the Rings Variants
Voltigeur Napoleonic Lord of the Rings Conversion
Games Workshop’s Lord of the Rings game is a marvelous skirmish system that is readily convertable to many other periods. Hey — Games Workshop proved it by releasing Legends of the Old West, a set of cowboy skirmish rules.
Voltigeur is a conversion of the system for Napoleonic gaming.
I wish I had some 25mm Napoleonic figures so I could try it.