What is his name, brothers, and what prison camp/s, and when did he take the oath? There is also the difference of taking the Oath of Allegiance to the US and signing a parole for exchange purposes.

Many soldiers at Rock Island, fed up with their condition, lack of rations, etc, took the oath, and enlisted in the US Army to fight in the west ca winter 64/5.

From that data, we might be able to hone you in on the prison camp doings during his sojurn there.

George Martin