Soldiers loading a half-ton shell into a disappearing gun during World War One. This photograph was taken by the official military photographer and is marked for official use only. The image serves as documentation of American military activities during the war.

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.