Ron,
I've got five that come to mind strait away as follows;
Napoleon's War in Spain by Lachouque, excellent history of the campaign loaded with great paintings and uniform plates.
L'Epopee Napoleoniene by Hourtoulle with illustrations by Jirbal. Excellent uniform plates/battle scenes with French text.
Waterloo by Lachouque, in my opinion the best illustrated history of the battle, has sections of the Waterloo Cyclorama painting.
Wellington's Regiments by Ian Fletcher, great history of the British Army with nice illustrations.
1814, The Campaign for France by Hourtoulle from Histoire and Collections. Title pretty much says it all really................