General Orders No. 150, American Expeditionary Forces, September 5, 1918. Amendment of orders regarding procurement of equipment and documentation of such.
Special Orders No. 23, Headquarters Air Service First Army, American Expeditionary Forces, September 6, 1918. Assigns fourteen men, including Marc Lagen, to various duties. Lagen assigned Assistant to Army Balloon Commander.
Aerial photograph of fields near Fleury, France, September 7, 1918.Inscription: "U.S. 1A 91Sq. B1666 S. of Fleury 387.3-249.1: 7/9/18: 13H 4900m 52cm."
Aerial photograph of Fort Queuleu, France, September 7, 1918.Inscription: "U.S. 1A 91Sq. B1660: S. W. Ft Queuleu: 387.5-255.7: 7/9/18: 13h 4900m: 52cm."
Aerial photograph of Fort Alvensleben, France, September 7, 1918. Trenches and artillery shell craters are visible in the center of the image.Inscription: "U.S. 1A 91Sq. B1659 Fort Alvensleben: 381.3-260.7: 7/9/1918: 13H 4900m 52cm."