Bataille Empire

Hello,
Please, why in the Austrian in Bohemia army the reserve artillery have two batteries and the general in chief are ordinary?
So, can I take one battery only?
Is a mistake or can I take the two batteries?
Thank you very much

Salut,
Désolé, personne ne sait pourquoi il y a deux artillerie en réserve et vous ne pouvez en prendre qu'une?
Merci beaucoup.

Can you not put one starting in a division and 1 in your reserve.