Not sure if any of you gentlemen are a fan of OTR as I am (old time radio, The Shadow, The Lone Ranger, Fibber McGee and Molly, ect) but these are some episodes of OTR from the 1940's and 50's that have a subject matter involving the Civil War. I'll list the episodes and then the link to the page they are on. These are all free of charge to listen to and if they are not, let me know and I'll point you to a free site they should be on.
You Are There - The Bombardment of Fort Sumter 5/22/49
You Are There - The Battle Of First Bull Run 10/3/48
American Portraits - There Stands Jackson 7/3/51
You Are There - Monitor vs The Merimac 4/4/48
NBC University Theater - The Red Badge of Courage 5/8/49
Escape - Occurance At Owl Creek Bridge 12/10/47
You Are The - Battle Of Gettysburg 2/22/48
You Are There - Appomattox 11/7/48
Crime Classics - The Lincoln Assassination 12/9/53
The Lone Ranger - Conference With General Lee 2/9/53
This is a link to a page these episodes are in along with a brief description of the episode.
https://www.otrcat.com/civil-war-in-old-time-radioThis is a link to Radio Echos.com, a free site to download or listen to these episodes. Just use the search feature and type in the episodes name.
http://radioechoes.com/