This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
monochrome Lot American Expeditionary Forces WWI. Captured German Artillery Somme Py April . William Mitchell Collection. Courtesy of the Library of Congress Lot American Expeditionary Forces WWI. Captured German Artillery Somme Py April . William Mitchell Collection. Courtesy of the Library of Congress