These may be in the written reasons for secession, but they are not necessarily reasons why the men fought and died. To know that, you would have to ask them, or their heirs to whom they shared the knowledge.
Indeed, most of the men who actually fought and died could neither read nor write.
When you get down to individual reasons for fighting, that is as varied as each individual.
Most, probably, fought for their state.
“Indeed, most of the men who actually fought and died could neither read nor write.”
That is an interesting comment.
May we see your data?