A must for the French army of 1814/1815 is Couderc de Saint-Chamant, Henri : Napoléon - ses dernières armées. Paris o.J. ... I published a (German) article on the section of Napoleon Online referring to the 1815 campaign. Just follow the link given below to the article - I think the tables could also be read by English speaking readers.

Kind regards from Berlin
Markus Stein