Mom showed me a bunch of Grandpa's memorabilia recently. He was in Europe; went through France in June of '44 as a medic, all the way until the end of the war (plus he stayed for a little extra time). I wish I'd talked to him about those experiences, but I never did. I'm not sure he would have talked much. Even his kids didn't know that much, except that Grandma used to have to wake him up with a broomstick for a while, else he'd think his nightmares were really happening.
He'd made a friend later in life who had been in the Pacific, including the Bataan Death March. I know they got to talk about some things that Grandpa wouldn't talk to most anyone about.
The memorabilia is really neat to read through. The Luger he carried (only thing he'd ever say was that he got it from a soldier who didn't need it any more) is still with my uncle, but I'm unclear about most other things.