Special Orders No. 20, Headquarters Services of Supply, American Expeditionary Forces, April 1, 1918. Confirms the necessity of Marc Lagen's travel to St. Dizier, France per verbal orders of Chief of Air Service.
Special Orders No. 39, Headquarters Services of Supply, American Expeditionary Forces, April 20, 1918. Instructs sixteen men, including Marc Lagen, to proceed to Souge, France upon completion of their current course of instruction.
Special Orders No. 39 (extract), Headquarters Services of Supply, American Expeditionary Forces, April 20, 1918. Instructs two men, including Marc Lagen, to proceed to Souge, France upon completion of their current course of instruction.
Telegram to Headquarters, Service of the Rear, American Expeditionary Forces, March 16, 1918. Orders Marc Lagen relieved from duty with the 54th Cie Aerostiers and to report to Chief Air Service.