What happened to the captured Confederate Soldiers?

For the first two years of the war, most captured soldiers were given parole and exchanged. Many returned to fight again. After the Confederate defeat at Vicksburg, the tens of thousands of Confederate soldiers were back in the fight within a few months. President Lincoln regarded this as foolish. He ordered a stop to the exchanges. Confederate prisoners were sent to camps in Ohio and Pennsylvania. Like the Yankees, the Confederates sent them to miserable prison camps. The most notable Confederate camp was Camp Sumter near Andersonville, Georgia, where thousands of Union men died or suffered permanent illness during the 18 months the camp was in operation.