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I did hear an interesting take on it that >>14273
seems to be echoing, which Dan Carlin delved into a bit in the latest installment of his Blueprint for Armageddon series http://www.dancarlin.com/disp.php/hharchive. Badly summarized by me, as the sides started tallying up their escalating grievances regarding ethical warfare, their own adherence to their ethics started crumbling, and ultimately everything descended into a crazy shitstorm like likes of which no one had ever imagined before. So really, it depends on when & where you were & what you were doing & who you were doing it with & to & for & how & why & & &...
Having read several thousand firsthand reports of countless battles in WWII, there appears to be nothing consistent, universal or predictable about hardly any of it. Shit gets so out of control, WWI doesn't even seem like a World War by comparison, to the total and complete meltdown of WWII.
OP, I'm afraid any answer to your Q is obscured by the murky depths in the bottomless pit of subjectivity, and yet floating further downward each passing year.