At the headquarters of the U.S. Sanitary Commission at Camp Letterman in Gettysburg, PA, a physician wields a liston knife (center) as a patient (in white) is held down on a table for an amputation.
<bdi>Attributed to <a href="https://www.wikidata.org/wiki/Q43731683" class="extiw" title="d:Q43731683"><span title="American photographer (1838–1906)">Charles J. Tyson</span></a>
</bdi>
1863-07
National Archives and Records Administration