Big Commander, even of you had that day with your Dad, unless you have been to war yourself, it is unlikely he'd be enthusiastic about discussing the war, nor would you, probably, really understand the real issues if he did. There are things that happen that cannot really be explained or understood unless you've been there. And it is my opinion it is better if you manage to avoid that particular understanding if possible and can do so without dishonor. I know for sure I never really understood until I'd been in Southeast Asia for a while. And if i could forget that part of my life, I might or might not. be more comfortable if I could, i guess. But I'd also be be amputating a part of myself and i guess i wouldn't want to do that. Besides - it makes me more cautious about wanting to resort to armed force than might otherwise be the case, and that is a good thing I do believe...
And WWI, especially in the line, was MUCH worse than the war i had. Much worse, unbelievably worse.