We can provide copies of service records through this message board: http://history-sites.com/research/confedrecs.html
Here's a history of Gantt's 9th Tennessee Cavalry Battalion. Let me know if you need more.
http://www.tngennet.org/civilwar/csacav/csatn9.html
There were no Union POW camps in Alabama. Confederates used temporary camps at Tuscaloosa and Montgomery. Cahaba (site of the old capitol near Selma) was established as a long-term prison and in opertation for some time.
Moreland's Alabama-Mississippi Cavalry operated with Roddey's command in the Tennessee Valley. What was your question about it?