David Hunter

David Hunter (July 21, 1802 – February 2, 1886) was a Union general during the American Civil War. He achieved notability for his unauthorized 1862 order (immediately rescinded) emancipating slaves in three Southern states, for his leadership of United States troops during the Valley Campaigns of 1864, and as the president of the military commission trying the conspirators involved with the assassination of U.S. President Abraham Lincoln.
https://en.wikipedia.org/wiki/David_Hunter