Overall a very nice diorama (subject is part of the area we model).
It's nicely tied to reality with the story inthe 2nd post.
A couple of pointer for the next one. I would apply a fine dust/tan colored pastel layer to everything. The Civil War was a dirty war, dusty, with horses kicking up dirt, men scrambling, gun poweder everywhere. You did get knees dirtied up - good, an overall dusting would add a bit more to it.
The cone pine trees in the back, if they are to stay or be used in another diorama I would vary the shape a bit. Take a pair of scissors and snip in at various angles and place to give them a more realist feel. ( I did notice they weren't 'on' a diorama yet).
Be careful blending figure bases into the diorama base and try to get figures to lay as natural as possible.