WW2 fatality estimates vary between 50 and 80 million people.
https://en.wikipedia.org/wiki/World_War_II_casualties So, obviously, someone got stabbed once in a while.
Our Gunclub lost our Iwo Jima and Okinawa Veteran. The Japanese over ran his unit, which was a communications unit, killed everyone (including the Navaho Wind Talker) except for Sammy and one other guy. Sammy was attacked by two Japanese bayoneteers, stabbing one with this knife:
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The other one was taken care of by "those Marines". Talking about WW2 with Sammy resulted in the man having nightmares, if he was able to sleep.
This sort of incident was rare. I will claim that more people died by drowning in WW2 than on the end of a knife blade. Yet, I have never seen any GI carrying a 5 gallon bucket with which to drown Germans. (It is surprising how many children drown in 5 gallon buckets!)
I had a boss, a WW2 veteran of the CBI theater. He was on the first troop ship to Australia. I showed him my Western Bowie knife, these huge knives were in every KMart sporting goods department.
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Boss said "imagine carrying that!". It was years later, but I am quite convinced what he meant was, he had carried enough weight during exhausting marches, that he did not want the added weight of an archaic and useless 19th century bowie.