While war may be hell in every generation in which it rears its bloody-horned head, the participants are never the same. There is simply no accounting for the differences between the men fighting in Afghanistan and those who fought in, say, the Guadalcanal. Because of this, we must not treat veterans of the wars in Iraq and Afghanistan as if they have a precedent. They do not. Theirs is a war of insidious casualties, where so much fighting takes place in the days, months and years after they've returned home. Although the same could be said for all modern American conflicts, the psychological struggles veterans face have seemingly become darker and more daunting in recent years.