Morale breaks are almost never universal. In my own rules, for example, I kept them limited to Elements (think squads or AFVs) or Units (think platoons) vice the whole playing Force (think company-plus) for that reason.
Of course, to really model morale on a tactical level, you need to have some kind of suppression mechanism in place as well. Unengaged elements rarely lose their resolve (though they might break upon the shock of first contact, but that is still facing fire) in a tactical sense. Operationally or even strategically, a given force's morale can certainly wither. The French had a term called la cafard ("the bug", colloquially) for forces facing monotonous garrison duty in inhospitable locales where forces would degrade over time.
Regardless, the action outside Lanzerath is an excellent example of small unit leadership, but also how an elite unit--in comparison to the units around it--can power through due to esprit de corps and just plain cussedness. There are plenty examples of that in history, too, but they are more widely known. Good find!