Know what a Grizwald is? A grenade. About the size of a battery. Responds to pressure. Our platoon was stuck in a trench outside of New Kasmir during the winter campaign. More'n a week, completely cut off, and the Alliance entrenched not ten yards away. We even got to talkin' to 'em, yelling across insults and jokes and such, 'cause no ammo to speak of, no orders, so what are you gonna do? We mentioned that we were out of rations, and ten minutes later, a bunch of apples rained into the trench. Cap said wait, but they were so hungry. Don't make much noise. Just little pops and there's three guys that kind of just end at the ribcage.
What was stopping them from just hucking grenades over to the Germans to begin with? You don't typically have to exploit trust of the enemy on the battlefield to throw a grenade.
It's much more effective if they are grouped together waiting to catch the grenade. It also reveals the position of the soldiers in the trench.
Grenades aren't very effective in trenches, unless the victim is close by. The narrow shape and curves of the trench can shield a person from a nearby blast.
If you're in a trench in wartime and fist sized object comes flying in from the direction of the enemy forces you're going to dive away from it and take cover. But then the thrown object turns out to be a can of food, not an explosive.
So how do you respond to the next thrown item? Do you still dive for cover?
The rational answer is "yes." The starving soldier desperate for a break from the fighting answer was not.
Plus trenches have dugouts and the like. You can imagine that after the first round of corned beef, people were probably waking their mates up, yelling at everyone to get out here and see what's happening.
British politeness developed mostly so we didn't turn our aggression inwards. Given how large the British empire got, it was quite effective.
Canadians seem to have taken this further. Impeccably polite, but that rage needs to go somewhere. The only thing worse than an angry Canadian is a "disappointed" Canadian. That's when you know you need to find cover!
Wilhelm II kind of deserved to get executed. The deeper you look into that guy the worse he gets. Obviously there were bastards all around but that shit was genuinely his fault.
Didn't happen, obviously, because consequences are for peasants.
WWI - yes, not necessarily specifically bcs of Nazis (one solder is just a human, exactly like the enemy solder), but because WWI was much more contained in fixed fronts, soldiers vs soldiers. Back then they still avoided civilians (but then tech advanced).