I'm curious. I see blood type patches for attachment to MOLLE gear, hats shirts, etc. all over the range and in LEO training courses, and I dont understand the purpose of the patches.
In the military, would they really transfuse type-specific blood entirely based on a Velcro patch on the back of somebody's gear or clothing? That would never happen in a civilian medical setting, including law enforcement, I'm surprised the military would go for it.