It took me 38 Hrs. of playtime but I finally figured out how to view the history of an army and to a lesser degree Generals' history.
You just have to click the army icon/unit, then go to details, be on force details, and finally look at the History of the force and scroll down with your mouse. It will show you the Generals that have lead the army unit and the number of losses and victories they had.
I saw the History before, but I never bothered to scroll down, and I just assumed they left that feature out.