Changes

*[http://www.history.army.mil/html/bookshelves/resmat/WWI.html#tab_1 US Army Centre of Military History online books] ''Order of Battle of the United States Land Forces in the World War'' (5 Volumes) and ''United States Army In The World War'' (17 Volumes). Links to Pdf downloads.

*[https://archive.org/details/americanarmiesba00wash ''American Armies and Battlefields in Europe: a History, Guide, and Reference Book''] prepared by the American Battle Monuments Commission 1938 Archive.org. A revision of the 1927 publication [https://hdl.handle.net/2027/uc1.$b744250?urlappend=%3Bseq=9 ''A Guide to the American Battlefields in Europe''] HathiTrust Digital Library

*French Official Histories: [http://www.memoiredeshommes.sga.defense.gouv.fr/fr/arkotheque/inventaires/ead_ir_consult.php?fam=11&ref=FRSHD_AFGG_ead ''Les Armées françaises dans la Grande Guerre''] sga.defense.gouv.fr. French language. Eleven ''Tome''s, some with multiple volumes, mostly about the Western Front. With online maps (Cartes) and at times panoramic sketches (Croquis panoramiques).

*German Official, or semi Official Histories: [http://digi.landesbibliothek.at/viewer/resolver?urn=urn:nbn:at:AT-OOeLB-1155545 ''Der Weltkrieg 1914 bis 1918: die militärischen Operationen zu Lande''] 16 Volumes. [http://digi.landesbibliothek.at/viewer/resolver?urn=urn:nbn:at:AT-OOeLB-1627302 ''Schlachten des Weltkrieges''] 22 Volumes. German language. Maps (Karten) are often at the back of individual volumes, and there may be photographs, all of which can be located by clicking on the Thumbnail gallery, and then selecting specific pages. The Digital State Library of Upper Austria.