My grandfather also drove a truck during WWII. He was stationed in Europe, but never saw combat. He dropped a crate on his foot while he was unloading a truck and got a purple heart for it.
Later, my Grandfather did see combat during the Korean war, and apparently lots of it. He carried the literal scars on his face until he died. The emotional scars were probably deeper, but he rarely spoke of anything he did.
On the rare occasion that he did, my grandmother was always there to keep him in check. Example, I don't remember what it was, but something on the TV set him off and he went on a heated rant about what he had personally sacrificed. My grandmother said, and this is a direct quote to the best of my memory, "Yeah, big ****ing war hero dropped a crate on his foot."
