Is it enough to know who the primary generals involved in each battle were, or will I also need to know the names of the numerous subordinate generals, colonels, captains, and individual Batallions/Companies etc.?

-Opposing Generals for each battle is usually good enough.

Are there any MAP questions on the exam (ie, identify where Vicksburg is)?

-No, but you should be able to distinguish between battles in the eastern theater, and western theater. The dividing line is roughly the appalachian mtns.

Do I need to know that 300 Union soldiers attacked from the right flank at 7:30am whilst 200 attacked from the rear at 8:15am. Or is it enough to know that 500 Union soldiers overcame 800 Confederate soldiers on the second day of battle and General X made a hasty retreat?

- Just know which side won, and how they won, (I.E. through utter defeat, withdrawal, a seige, etc. )