Smallish ACW battles?

[vtsaogames]

Reaching out to the hive mind:
I recently played First Bull Run with Bloody Big Battles rules. It's a mid-sized to samll game on a 4 X 4 foot table. I rather like the feel of it.

Can you chaps suggest other ACW battles with about 20,000 per side? A little larger, a little smaller is fine.
A little before or after the ACW is OK too.

Thanks in advance.

[Inkpaduta]

Several of the battles in the Shenandoah in 1862 and 1864 would work.
In the Trans-Mississippi you could do Wilson Creek, Pea Ridge or Prairie Grove. 

[vtsaogames]

Pea Ridge, now there's an idea.
There's an old Volley and Bayonet scenario online that could be sampled.

[Pan Marek]

Monocacy, 1864.  Union about 6000, Confederates about 14,000.  Union delaying action.

[CapnJim]

Pea Ridge is a goon 'un.  You can do Elkhorn tavern and Leetown on the first day, and the whole giddyup the second day.  You can even do a mini campaign, where the fights on the first day affect the battle on the second... 

Mill Springs could be a good one too.  Smallish, with either side of 5000 per side - you just use battalions/regiments instead of brigades, but I think BBB could do it...