Check Arkansas and Indian Territory as Mahlon Erickson, I believe is his name, is trying to record all the men buried in Oklahoma that fought in the Civil War. He has posted in the past that most buried in Oklahoma were Union men. He may be interested in your information if you have not already shared it with him in the past.
My own gg grandfather J. D. Pearce was CSA 8th Arkansas and is buried at Durant, Oklahoma so that explains my interest in the project.
Linda