Parole camp

They could be restored to a combat role if some prisoners of war were traded to the other side.

This would enable them to be returned to a combat role as an exchange for the newly freed prisoners of war.

Conditions in the camps were unpleasant; the parolees refused to do guard duty or routine work, claiming that would violate their parole.

[1] An honor system was set up where each side would take care of housing its own soldiers who had been designated as being on parole, meaning they would not fight in combat unless they were formally exchanged.

The Confederates did not set up parole camps; they let their men go home and expected them to return to duty once officially exchanged.