[QUOTE=mikeross506;774930]
Quote Originally Posted by chuckman View Post
True. Which is why I never fully understood the explosion in popularity of these things, but that's down a different rabbit trail.[

I don't know when it started but it was our Battalion's SOP to have them labeled on our kevlar, boot tops, and front of our shirt. Then it slowly carried over to having it on a tag on the straps of our helmets. Next, came the patches that velcro'd to the ACUs.
I find this interesting because we (corpsmen) were told NEVER to transfuse without a type/match, or to transfuse O neg. We were advised to even not pay attention to dog tags.