I vaguely remember something to that effect some years back but believed it had been thoroughly debunked. I never gave it a second thought.
It makes no difference it is untrue. It serves the purpose of engaging veterans who have broken their oath of enlistment.
This sign was manufactured by a far Left non-profit organization called "Vote Vets". LINK: Vote Vets
That is what got me riled up. Their website "boasts" 1.5 million members, which I find disheartening.