For the 168th Iowa the best source is Taber, Story of the 168th Infantry. It needs comparison with the ABMC file, RG 117; 42nd Division: Summary of operations in the World War; and Major Ross’s diary.”
Unfortunately, Taber’s book, although long out of print and no longer under copyright protection, has yet to be added to any collection of online libraries, whether Google Books or . I have been unable to find a copy locally, so I will probably have to find one via interlibrary loan.
Major Ross is Lloyd D. Ross of the 168th. He was from Red Oak, Iowa and eventually became a front-line commander in the last few months of the war.
The papers of Major Ross are . . . principally a huge dairy for his service in 1917-1919.”
His granddaughter Martha Braley still has the diary.
ABMC is the American Battle Monuments Commission. The records are at the National Archives, split between two sites — College Park, Maryland and Washington, DC.
Although I thought 117 might refer to the various support units of the 42nd Division, such as the 117th Sanitary Train or the 117th Field Hospital, the number just happens to be the one chosen for all ABMC records. RG 117 is shorthand for Record Group 117.
I am looking for a copy of the official ‘summary of operations’ but have not been successful, either online or using Worldcat.
Oddly the MacArthur Memorial in Norfolk, Virginia has another group of records with the designation RG 117, those of Colonel A. M. Neilson, relating to World War II.
Regarding MacArthur at Châtillon, Ferrell’s book challenges the general’s account, highlighting the men around him as the true heroes.
Ferrell has completed a chapter in the history of World War I that has stood unfinished for years, showing in masterly fashion how MacArthur exaggerated his reputation at Châtillon. The Question of MacArthur’s Reputation will reward historians seeking to fill gaps in the record, engage readers who enjoy descriptions of battle, and startle all who take their heroes for granted.”