Just for right now: (I'm on call at the hospital this week, and it's been crazy)  Training is 16 weeks, basically qualifies you as an EMT-B, later option to be ACLS certified.  If you want to stay in the field then you need to get some sort of guarantee from your recruiter for a light infantry brigade--be a "walking medic", otherwise you will spend most of your time pulling sick call at a Troop Medical Clinic.  Kinda boring.  I'll write some more later tonight if I don't get called in <img src="images/graemlins/smile.gif" alt="" /> 
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Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space,  a critter that can be killed but can't be tamed. --Robert A. Heinlein