Re: When did camouflage become acceptable attire?
I saw people on college campus in the early 70s wearing camo, and not all of them were veterans. Even though Vietnam was an unpopular war, there were still a few imposters/poseurs/military buffs during it who wanted you to think they were ex-military.
Dr. Howard, Dr. Fine, Dr. Howard: For duty and humanity! --Men in Black (1934)