The casting for the German officer...

Who the hell decided to cast a guy with flowing shoulder length locks for the part of the Wehrmacht officer at Normandy? That was a real immersion distraction seeing this officer who looked like a Korean comic strip's idea of what a German officer should look like, regulations aside, no army, let alone the German army at the time, would have had a high ranking officer with hair like James Hunt...

For a war movie it's really surprising they would make that mistake.