The battle scenes were "realistic" without being disgusting.
Lang really "stole" the scenes in the role of General Thomas "Stone Wall" Jackson - you had to get the since of the real Jackson.
The entire movie exudes authenticity as far as the human interactions are concerned.
Long (4ish hours- with an intermission) - but if you can find the time it's a must see. Remember the little square screen at home is not where you want to see this - this is one of those movies that needs and deserves a "Big Screen."
And a few hankies.