Paul T. Dean said this quote

“ In addition to the American officers, walking around the bustling camp were French and British officers who lectured the wide-eyed teenagers about the conditions in the trenches on the Western Front. The foreign officers told stories of the terrible battles of Ypres, the Somme, and Verdun. Roy listened with awe and foreboding to the danger from unseen enemies firing shell after shell, the muddy lines of trenches, the heroic acts of men disregarding their own safety to rescue wounded comrades. ”