At the end of the War, General Robert Lee and other high level Confederate officials (including the Confederate Secretary of War) were to be charged with the broad crime of conspiring to injure the health of Union soldiers held in the Confederate states. However, in August 1865, President Andrew Johnson (left) ordered that the high-level charges be dropped. Nonetheless, Wirz was eventually prosecuted for mistreating and murdering Union soldiers detained in the prison in violation of the laws and customs of war. Several former prisoners testified against him.
In his defense, Wirz argued that under the circumstances of the war, he was unable to ensure proper conditions in the prison and was otherwise just following orders. In pleading his case, he wrote:
I do not think that I ought to be held responsible for the shortness of rations, for the overcrowded state of the prison (which was in itself a prolific cause of the fearful mortality), for the inadequate supplies of clothing, and of shelters &c. Still I now bear the odium, and men who were prisoners here seemed disposed to wreak their vengeance upon me for what they have suffered, who was only the medium, or I may better say, the tool in the hands of my superiors.
May 7, 1865 letter from Capt. Hy Wirz to Maj. Gen. J. H. Wilson. (This letter, the indictment, and judgment against Wirz are available in U.S. Army, 8 The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies.)
The military commission rejected Wirz’s defense and sentenced him to death by hanging. Notwithstanding that many wrote to President Andrew Johnson pleading Wirz’s pardon or at least the commutation of the death sentence, Wirz was hanged on November 10, 1865 (left). On the gallows, he reputedly stated:
I know what orders are. And I am being hanged for obeying them.