Of the 211,411 Union soldiers captured 16,668 were paroled on the field and 30,218 died in prison. Of the 462,634 Confederate soldiers captured 247,769 were paroled on the field and 25,976 died in prison. The mortality rate for prisoners of war was 15.5 percent for Union soldiers and 12 percent for Confederate soldiers. Last updated: May 6, 2015.