You can use this work for any purpose, including commercial uses, without restriction under copyright law. You should also provide attribution to the original work, source and licence.
Creative Commons Attribution (CC BY 4.0) terms and conditions https://creativecommons.org/licenses/by/4.0
'Russo-Japanese War: a man being treated on a table in an open-air Japanese field hospital, others watch. Halftone after M. Cowper, after a photograph, 1904.' by Max Cowper. Credit: Wellcome Collection. CC BY