LeftieAnon opine re: Lefties-
Can't find the sauce, but remember reading long ago that Alaska has an unusually high number of lefties per capita. Theory was that lefties are unconventional by coping in a rightie world. As a result they migrate to unconventional locals more than righties.
If this theory holds true, I suspect this army also has a disproportionate number of left-handers. It would also stand to reason that purebloods (non-vaxxed) are tilted this way.