I was attached to a US Army brigade back in the mid 80’s. We had about 3000 soldiers & officers in that unit.
In 3 years IIRC we killed 4 people in accidents that were directly related to training. Two were jeep crashes in the field, one guy got run over by an APC at night, and one guy screwed up a helicopter insert-rapelle & fell some 100’ to the ground.
In the same time period we lost about 1 a month to DUI or other similar “died while young, dumb, and full of testosterone” cause. We lived in an area with excellent SCUBA conditions & several people drowned or were lost at sea while recreating.
During my 8 years in the USAF the units I was associated with lost 1 airplane & zero pilots/crew. I don’t recall any training losses of USAF ground guys; combat engineering, police and such that engaged in potentially dangerous training-play. I suspect there was probably one but the memory is just too hazy to report here as a fact. The bases I worked on had 3000-4000 people on them.
We did lose a few to DUI & YDfT, but not nearly at the rate the Army did. Maybe one every 6 months.
One man’s anecdotal evidence, YMMV.