|International humanitarian law|
|Courts and Tribunals|
|Related areas of law|
The Lieber Code of April 24, 1863, issued as General Orders No. 100, Adjutant General's Office, 1863, was an instruction signed by U.S. President Abraham Lincoln to the Union forces of the United States during the American Civil War that dictated how soldiers should conduct themselves in wartime. Its name reflects its author, the German–American legal scholar and political philosopher Franz Lieber.