I recently found this locket with a photo of what appears to be a young man in Civil War era uniform. He's wearing what appears to be a shell jacket with a kepi style cap. The cap badge looks almost like a GAR badge, But it appears to have the initials "ACW". The same initials also appear on the collar tabs. The uniform also has cloth epaulets. I have done some cursory research but I've not found anything to help identify what this uniform is or what unit or group this young man belong to. Any ideas?