If you refer to the WW1 claim floating around, then it is most likely false. If you are talking about the fact modern military has many nore support ropes than combat roles, then... yeah, but that tells nothing about the willingness to fire a gun.

There's a book on this called On Killing by David Grossman.[1]

"In World War II, only 15 to 20 percent of combat infantry were willing to fire their rifles. In Korea, about 50 percent. In Vietnam, the figure rose to more than 90 percent."

[1] - https://www.amazon.com/Killing-Psychological-Cost-Learning-S...

Yeah about 8:1 in 2005 for the US

https://acoup.blog/2022/04/22/fireside-friday-april-22-2022/

I wonder what they start doing after enduring a single artillery barrage in a city. That must be horribly traumatising to see.

I recently came back home from travels and realised that our neighbour’s car burned down(I live in London), and it just struck me how horrible it looks like. That’s after seeing many videos of total destruction in Ukraine. It just never popped into my mind how unusual it is to see something like that.

That wasn’t even people dying, just practical realisation how not far we are from total civilisation collapse, if the majority of citizens wanted that.