claim: Yin and yang show a balance between demons.
evidence: LaFayette Guild -LRB- November 25 , 1825 -- July 4 , 1870 -RRB- was a surgeon in the antebellum United States Army , a noted pioneer in the study of yellow fever , and then a leading medical administrator in the Confederate States Army during the American Civil War .. American Civil War. American Civil War. antebellum. Antebellum era. United States Army. United States Army. yellow fever. yellow fever. Confederate States Army. Confederate States Army. He served directly under General Robert E. Lee as the medical director for the Army of Northern Virginia for all its major campaigns , including the Gettysburg Campaign and the Overland Campaign .. Army of Northern Virginia. Army of Northern Virginia. Robert E. Lee. Robert E. Lee. Gettysburg Campaign. Gettysburg Campaign. Overland Campaign. Overland Campaign