"Dear Mother, the men learn very quickly; faster than white troops, it seems to me. They are almost grave and sedate under instruction and they restrain themselves. But the moment they are dismissed from drill, every tongue is relaxed and every ivory tooth is visible and you would not know from the sound of it that this is an army camp. They must have learned this from long hours of meaningless, inhuman work to set their minds free so quickly. It gives them great energy. And there is no doubt we will leave this state as fine a regiment as any that as marched. As ever, your son, Robert."
January 1, 1970
https://en.wikiquote.org/wiki/Glory_(film)