I have posted this before, but the silliest story I ever heard was told me by a vet's son. The vet claimed that his Japanese Type 99 rifle was captured in hand to hand combat with a Japanese general. His son, who was fairly knowledgeable and not on good terms with the old man, asked how the crest got ground off.
The vet told his son that Harry Truman personally kept track of every war souvenir and after he (the vet) got back home, Truman sent the FBI to seize the rifle; when they returned it, the crest had been ground off.
Golly, and Truman had time to be president too!