Yes. It literally takes a prick of the finger and a few minutes. It's supposed to be standard procedure before being allowed to donate.

Except they're supposed to check iron before they even start any other prep, because if you are anemic or low in iron for any other reason, the blood is completely useless. It's a medical procedure that has guidelines they're supposed to follow, and they failed to do so. OP could have sustained a serious injury from them not adhering to protocol. They are at fault for their mistake.

That's never happened when I've donated blood. They only had me fill out a form and asked me a few questions. Maybe they just don't care when it's military donating to other military.

Or OP passed out from low volume status which is not an uncommon side effect of blood donation, even in totally healthy individuals.

Actually, any blood donation place worth beans tests your iron levels before donation (it only takes a few seconds and a small stick on your finger). So yeah it is their fault. If they'd tested OP for iron and it was that low they shouldn't have taken their blood in the first place

I believe OP meant that due to the reduced oxygen carrying capacity of her blood after the donation she had symptoms comparable to anemia, not that she had a pre-existing medical condition.

They check your blood iron levels to make sure you are able to donate. Therefore, they would in fact know if her iron levels were borderline.

You've never gotten that pinprick where they take a drop of your blood and put it into some liquid? The Red Cross does it. That's supposed to test for anemia. There's a minimum iron level you need to be able to donate.

OP could have iron that's in the right margins and still have passed out from donating.

When you are in the right margins but it's close, they're still supposed to tell you. They also shouldn't be doing it in a non-sectioned off area because it involves people's medical information.

I always take someone with me when I give because blood donation makes me woozy.

And how exactly would STRANGERS at a blood drive KNOW her iron levels???

BECAUSE they test your iron levels before taking any donations! I've donated many many times and this is one of the first things they do. Quick stab, get a sample on a slide and stick it in a machine, 15 seconds later BOOM! Iron levels. It even has to be higher than just enough to be healthy because donating lowers the iron levels. OP could have passed out from just the blood loss itself, which can happen with no relation to iron levels

Vaso-vagal syncope