Well, I badly expressed myself, sorry

: I'm working on a scenario for the battle of Arcis-sur-Aube. I don't give up this scenario, but at first I will focus on the first day of the battle (less troops !). This is my first historic scenario, and I am impatient to end it : I think I have to test all the stages of the scenario in order to better understand the possibilities and the constraints.
I give up the two-days battle for a while, but your advices are interesting, I will experiment it soon!

Thanks again !