This image was acquired from
wikimedia. 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:
Federal soldiers in confederate fort on heights of centerville.tif Photograph en Group of Federal soldiers in Confederate fort on heights of Centreville with Quaker guns Barnard George photographer Gibson James photographer negative plates glass stereograph wet collodion LOCimage cwpb accession number LCDIGcwpb digital file from