Francis Lieber was a Prussian-American jurist and political philosopher. He is most well known for the Lieber Code, the first codification of the customary law and the laws of war for battlefield conduct, which served a later basis for the Hague Conventions of 1899 and 1907 and for the Geneva Conventions. He was also a pioneer in the fields of law, political science, and sociology in the United States.
Francis Lieber
American gymnastics proponent, John Neal
The Lieber Code was the military law that governed the wartime conduct of the Union Army by defining and describing command responsibility for war crimes and crimes against humanity; and the military responsibilities of the Union soldier fighting in the American Civil War against the Confederate States of America.
The jurist Franz Lieber, LL.D., modernized the military law of the 1806 Articles of War into the Lieber Code (General Orders No. 100, April 24, 1863) for the Union Army to legitimately prosecute the civil war (1861–1865) begun by the Confederate States of America.
Gen. Henry W. Halleck commissioned the jurist Franz Lieber, LL.D., to modernize the military law of the 1806 Articles of War into General Orders No. 100 (1863), the Lieber Code, for the Union Army to fight the guerrilla warfare of the Confederacy during the American Civil War (1861–1865).
The Prussian military theoretician Carl von Clausewitz in uniform
Gen. Sherman at Federal Fort No. 7, after the Atlanta Campaign, September 1864.