Detecting feigned illness during the American civil war

The problem of feigned illness was a common one in the Civil War, afflicting both Northern and Southern military forces. The diagnostic approach of the Civil War doctor involved the initial dichotomous classification of each patient; he either suffered from physical illness (what today would be called an organic illness) or he purposely devised symptoms to avoid military service. The modern concept of the unconscious mind was totally absent from the diagnostic thinking of the Civil War physician.