In building an army from scratch, which units go where to be best utilized? Naturally, infantry is best used in divisions. Up to four artillery elements, but not more, equally in a division; any others go in the corps or army structure. A sharpshooter unit per division, I believe I read somewhere. Where do engineers go? Marines? Cavalry - in divisions, or corps level? Etc.
Pointing me to a document or thread where this has been discussed is fine. I found some pointers in the quick reference guide, but not on all those things.