File:Field-artillery-beaumont-france.gif

Description: Crew with "Bridget" of Battery C, 6th Field Artillery, which fired the first shot for America in World War I at 6.05 a. m., on October 23 1917, from a position 400 meters (437 yards) east of Bathelemont.
Read : http://history.amedd.army.mil/booksdocs/wwi/fieldoperations/chapter9.htm

The gun is a French Canon de 75 modèle 1897 named Bridget, held today at the United States Army Ordnance Museum (Aberdeen Proving Ground, MD), USA.
See : Image:75mm field gun m1897 1.jpg - the gun as it appears today.

Source: https://arcweb.archives.gov/arc/basic_search.jsp archive copy at the Wayback Machine ARC Identifier: 530744.

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