REPUBLIC TO EMPIRE is the Napoleonic rules that I worked on with Barry Hilton. The general impression I've gotten from reading forums and blogs is that people think the rules are complicated. The game play is smooth and free flowing with minimal need to refer to the main text once concepts have been mastered. New players usually pick up the key mechanisms within three to four game turns and our play testers were able to run games using only the quick reference sheet.
REPUBLIC TO EMPIRE can be used for all scales although they are primarily written for 28mm scale Divisional to Army level games. However, during play testing, most of my games were played solo with only a single brigade per side. The mechanics work perfectly fine for games of this size with one simple rule change: No Manoeuvre Points are required to maintain Brigade Orders. Manoeuvre Points are still required to allocate new orders to brigades or issue Single Unit Actions.
Playing games in this fashion is the perfect way to learn the rules or introduce new players to the hobby. A game of this size can be played in about two hours, possibly less once you've got the hang of the rules.