Marine Corps in the Eighties, we had that too, of course. A few guys getting killed in big exercises wasn’t uncommon. My uncle (Army, Germany in the 50s) said the same thing.
Happened a lot when I was in Germany 1988-90
Usually somebody got ran over during night ops, although there was the two guys that thought wearing a pro-mask filtered carbon monoxide out of vehicle exhaust. They were using the exhaust to heat their pup tent. Oops!