I strongly recommend a series of books called "D-Day Through German Eyes" that narrates the experience of the seaborne invasion through the translated narrative

I strongly recommend a series of books called "D-Day Through German Eyes" that narrates the experience of the seaborne invasion through the translated narratives of German soldiers. One theme that comes up again and again is their sheer demoralizing shock at seeing just how colossal the armada confronting "their" beaches was. Despite this, because of the harsh sense of discipline inherent to the German Army during the war, they fought remarkably hard against the still largely inexperienced allied western soldiers and made the first weeks after the D-Day landings much harder then they should have been for the Anglo/British/Canadian and sundry forces.