I was watching a rerun of this show on the Military Channel just now; the Sapper Tab is awarded to troops who make it through the Sapper Leader Course. Combat engineers--the ones who build bridges and battlefield fortifications, lay and clear minefields, and that sort of thing.
The training looked grueling--rappelling down a tower and a cliff, basic survival training, anything the instructors could throw at them.
One of the graduates was a captain, a woman. You know, one of those delicate flowers the conservative military experts say are too weak and fragile to make it in battle?
Oh wait--most of those conservatives are cowards who dodged the draft themselves. That "delicate flower" outlasted most of the big, tough manly men in her class.