Three Points
1. In David Hackworth's book About Face, there is a section about the time he was assigned to accompany "SLAM" Marshall on a tour of Vietnam, during our involvement there. SLAM comes out smelling more like the manure than the rose it was supposed to nurture.
2. In July 1998, I was invited to attend a symposium for firearms instructors hosted by California POST. Two of the speakers, Bruce Siddle and Dave Grossman, praised SLAM's book Men Against Fire effusively. As a result, I spent something like $60 to purchase a rare copy of this out-of-print book. The most valuable part to me was the photograph on the rear of the dust jacket. SLAM, still wearing the eagles of a full colonel, is seated at a desk, wearing an 82nd Airborne patch on his right shoulder and a Combat Infantryman Badge over his left breast.
SLAM was assigned to the Office of the Chief of Military History during WWII, which had no slots for infantrymen. While he may have chosen to publicize the actions of the 82nd Airborne during Operation Overlord ("D-Day"), he was never assigned to that unit. The CIB is only supposed to be issued to those who have been exposed to hostile fire while serving in an infantry MOS. I brought these disparities to the attention of Dave Grossman, figuring that, as a former Ranger, he would appreciate these disparities. I don't recall if I even got a response to that e-mail.
3. While he himself was partially discredited for plagiarism, the late Stephen Ambrose (in the introduction to Band of Brothers, as I recall) points out that SLAM latched onto the 82nd Airborne, which made him a fair amount of money in book royalties, and totally ignored what Ambrose considered the very heroic actions of the 101st Airborne. Ambrose commented that he felt that the true historian of the WWII Office of the Chief of Military History was Forrest Pogue, who only attained the rank of master sergeant but had a Ph.D. in history and was asked by Chief of Staff General Geroge Marshall to write Marshall's authorized biography.