Aerial photograph showing trenches during World War One. The photo was taken by photographer Rood from the Signal Corps. It is an official issued symbol of an aerial assemblage photograph, denoting its significance and accuracy in documenting the trenches.

Royalty-Free Standard Commercial licenses are granted for worldwide, non-exclusive and perpetual use, unless specifically noted otherwise. All Royalty-Free transactions are final. The Royalty-Free Standard Commercial license has no limitations and covers up to 15 users.