Civil War reenactors stage battles each summer at Hale Farm and Village in Bath, OH inside or at least near the Cuyahoga Valley National Park. I think it's every summer but I could be wrong on the frequency so you may want to check online for schedules and stuff.
It's worth seeing in person if you can. It's something to stand there and watch the cannons fire and the men march across the field in mock battle. You get a taste, however small, of what it would have been like to been there with it was live ammunition flying around.
Today's photo was shot across one of the fields zoomed all the way out at 300mm on my old Canon Rebel XT (I still have it around here somewhere). Even with that zoom I had to crop for effect. What I didn't realize until later was just how unique the timing was on this one. Look closely at the cannon. The charge has been lit but hasn't yet come out the end of the barrel. The funny thing is I had a kid on my shoulders as I took this, hand held. Weird how things work out sometimes.
Oh, if you are wondering, it is loud. Very loud.