Special Orders No. 13, Headquarters Services of Supply, American Expeditionary Forces, March 25, 1918. Assigns Marc Lagen to duty at Headquarters Air Service, Services of Supply.
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.
General Orders No. 150, American Expeditionary Forces, September 5, 1918. Amendment of orders regarding procurement of equipment and documentation of such.
Memorandum issued by Captain Birge M. Clark, American Expeditionary Forces, November 17, 1918. Certifies Marc Lagen's record of hours in the air with the Third Balloon Company.
Memorandum issued by Captain W. P. Kelleher to First Lieutenant Marc Lagen, August 25, 1918. Informs Lagen that he will relieve another officer for his meals for the next two days.