The item currently in hand is an instructional pamphlet titled Automatic Rifle Section. According to the title page, it was issued by "Infantry Weapons School, Third Corps Schools, American Expeditionary Forces." I was considering creating a heading along the lines of $a United States. $b Army. $b Corps, 3rd. $b Infantry Weapons School. However, after a bit of research and conversation I'm not sure such a heading is appropriate.
Background (as I understand it): Units in the AEF (WWI) were, by necessity, hastily assembled, and their make-up was primarily men with varying degrees of actual military training. The corps set up "schools" like the above-mentioned Infantry Weapons School to train the soldiers, but training was essentially done at the rear while there was fighting at the front. (For more information, see, for example: https://history.army.mil/html/books/024/24-1/CMH_Pub_24-1.PDF (pages 12-13).) I don't believe that there was an entity officially named the Infantry Weapons School affiliated with the 3rd Corps during World War I, but instead that it was more of a training course.
Does this make sense? Or would you consider this an entity worthy of its own heading? Is it an entity, or isn't it?
Aaron P Bert
U.S. Army Heritage & Education Center
950 Soldiers Drive
Carlisle PA 17013-5021