When it comes to taking down the worst of the bad guys and protecting the homeland, most people probably think of SEAL Team Six killing Bin Laden or the FBI arresting an ISIS sympathizer.

While their feats are well-known, there are several other units within the U.S. military, intelligence community and law enforcement that you’ve probably never heard of.

And they’ve done and continue to do some amazing things.

Here are just 4 of them:

1. Shadow Wolves:

The Shadow Wolves are an elite tracking unit within Immigration and Customs Enforcement. While other law enforcement agencies employ the most state-of-the-art methods to hunt down criminals, the ‘Wolves’ are an all-Native American group, and they could still find you if you made them count to five thousand in a game of hide-and-seek.

No really, these guys track drug smugglers and traffickers in the desert between Arizona and Mexico. And they can pick up a trail from bent twigs or a faint footprint in the dust. From one set of footprints, they can determine where a target came from, where he is going, and even how much weight they’re carrying with them.

In fact, their traditional tracking skills are so valued, on occasion they’re dispatched to other countries to teach their border patrol guys and law enforcement officials how to operate the Shadow Wolf way.