I know my maternal grandfather was drafted in -39 to take part in the rather desperate Winter War (also sometimes known as the Finno-Soviet War) against the USSR, as were about all the young men that could be scrounged up. I know he also served as a junior officer (squad leader level) in what we usually call the Continuation War (-41 to -44; Finland signed up for Operation Barbarossa and eventually made a spearate peace with the USSR when everything was going to Hell - after which we were promptly obliged to chase the several hundred thousand German troops remaining in the northern part of the country into Norway).

I don't think he's ever talked about it in the family. Ever. But he has written some war memoirs. A lot of veterans did, just to cope with the memories. I've read one of those, a pretty gripping account of experiencing an artillery barrage.

I know very little of my paternal grandfather, but apparently he managed to weasel his way out of the uniform. Go figure. Not an entirely stupid thing to do, mind you.

And I've heard my maternal uncle's father-in-law served as an army sniper. He's apparently been none too talkative about it either (small wonder), and even his memoirs studiously avoid the subject. One gets the impression the job sort of got to him.