Since BOA i've felt there has been a problem the way you see Enemy stacks, If there is more than one stack in a region you can only see detailed tooltip info on one of them, i.e. the strength of each unit (or division) while the other stacks in the region are only listed as "also here: Second Army *** (500pts)" and "Boston Garrison (18 pts)", for example, even if you have the highest detection level.
Surely you should be able to cycle through the stacks to view detailed info on each, or even be able to view enemy units in the bottom toolbar in the same way as your own. I think it is a shame that you miss so much of the art work by only seeing the enemy generals picture or one small unit graphic if the stack is leaderless. This has improved with the detailed battle result screen but still is not accessible.
You may argue that you shouldn't be able to know so much about your enemy but as long as the info was restricted by Detect level then its not unreasonable to imagine that sufficient patrols have returned with prisoners from each unit for your intelligence branch to have constructed an enemy OOB! Likewise, you would know what each enemy unit looked like, whether they had low/high cohesion (i.e. morale/desertion) and who they were brigaded with.
If there's already a hot key i'm overlooling please let me know!?
PS. I remember playing BOA at some crazy small resolution on my old CRT and not being able to see all the tooltip info on Washington's army stack besieging Boston because it was so full of weak 1/2 element Militia units! Gone are those days now the game has Divisions and Corps and with my 24" wide screen!