Thousands of Confederate soldiers died in Chicago during the Civil War, not from battle wounds, but from disease, starvation, and torture as POWs in a military prison three miles from the Chicago Loop. Initially treated as a curiosity, attitudes changed when newspapers reported the deaths of Union soldiers on southern battlefields. As the prison population swelled, deadly diseases--smallpox, dysentery, and pneumonia--quickly spread through Camp Douglas. Starving prisoners caught stealing from garbage dumps were tortured or shot. Fearing a prisoner revolt, a military official declared martial...