Doing some family research and this surprised me.

My great, great grandfather served with Company H 7th Mississippi Infantry during the Civil War. When he died in 1918 my great, great grandmother completed and mailed the application for a marker for a US veteran. She clearly listed his unit as I have a copy of the request. That headstone is on his grave today provided by the US government.

Now, that seems odd doesn't it given he did not serve in the US armed forces? Wonder why?

Maybe this helps?

Do you have a picture of his tombstone?

https://www.archives.gov/publications/prologue/2003/spring/headstones-sidebar.html

Does the marker list the regiment?

I do have a picture and it's similar to the one shown in your link and lists his regiment. He's not buried in a national cemetery though. I suppose they didn't hold fast to that idea.

I found the headstone and didn't think much of it as I've seen those before. The application to the US government and confirmation that they supplied it really surprised me.

The headstone came from Gannt's Quarry in Alabama.

Thanks everyone!