Personally I blame the movie 300. I never saw Marines sporting Corinthian helmets until it screened.
Just kidding, it’s not all 300’s fault. I actually get a kick out of the flick, though I don’t mistake it for history or a warrior culture that I’d want to emulate. But I wonder if the “cult of the warrior” trend is more a response to cultural changes around military organizations than the result of peacetime commanders looking for something to do.