According to family lore my Great Grandfather, Dr Whitman Gibson Stickney, organized people stateside to serve in WW1 (aka The Great War) & went to the front lines as a Doctor. This sent me on a search some years ago and although I found very little compared to WW2, what I did find was profound.
A film worth seeing is airing on C-Span's American History channel this weekend (reel America) showing World War 1 in 1915 footage. It can be also be found at shootingthegreatwar.blogspot.com or go to the Library of Congress (loc.gov).
I will try to relocate the oversized picture book I found in our local library & post some of the pictures. They are graphic, but this war is largely ignored and so very relevent today.