Most of these specialized records are only available on-site at the appropriate research facility.
Record Group 92 (National Archives)
Records of the Office of the Quartermaster General. See description of RG 92.
Includes Graves Registration Service, see the heading 92.9.1 Records of the Graves Registration Service (GRS) on the description page.
"20th Century Military “Burial Case Files” 1915-1939 (RG 92 NM-81 Entry 1942)"
Location: National Archives at St. Louis
Find in library catalogs
"World War, 1914-1918" "Prisoners and prisons"
Military usage: any persons who are not present and ready for assignments. Includes sick, wounded, missing, held prisoner, dead, or any other reason.
Currently, often used interchangeably with dead.
Find sources in library catalogs:
"World War 1914-1918" "Registers of dead"
"World War 1914-1918" "Navy Registers of dead"
New York Times (ProQuest Historical)