There was one a while back. Check the scenario pack?
The Seventh Battle is based after the events of Sixth Battle, it seems. So not really it.
I'm surprised people still remember that scenario, I feel like I built it forever ago!
My original idea was actually to recreate the Sixth Battle in C:MANO, but I found that there were too many things from the book that I couldn't recreate with the game engine at the time, so I moved on to the hypothetical "Seventh Battle" instead. I've since moved on from scenario building but I'm sure between new mechanics and Lua it's now possible to make a scenario that truly does justice to the book.
Ah, it was yours! good scenario nevertheless.
Since I know nothing about scenario building, thus throwing the idea around here, since somewhat detailed OOB and events are in link. Maybe someone grabs this idea.
"To meaningless French Idealism, Liberty, Fraternity and Equality...we answer with German Realism, Infantry, Cavalry and Artillery" -Prince von Bülov, 1870-