Lynda was certainly right about adding sources. Not sure if you have sources and just haven't posted them but a good place to START for the military record is the free National Park's website at https://www.nps.gov/civilwar/search-soldiers.htm
Once you've found possible candidates, many states have great civil war records posted. As you get drawn into the hunt, you might want to pay for FOLD3 records (at times they make access to some of their records free for a week) You'll need to know if the family stayed in Alabama. Since Alabama wasn't a "border state" it's likely most sons were confederates.
When I started researching my ancestor's Civil War records in Arkansas it took months to piece the story together...... but it was well worth the time.
Enjoy the journey.