The 300 Spartans.

Not because they were so well-armed, heavily armored or technologically superior. These guys must have been the scariest ever to face, precisely because they were the exact opposite.
Imagine you’re a Persian soldier, standing in the first row, facing Leonidas and his men. Behind you is an army ten times the size of your opponent. But you’re anonymous. A meaningless face behind a mask in a sea of metal.

Standing across the horizon you see 300 faces. Actual, real faces, sitting on actual, real bodies. You can see the muscles, the scars a lifetime of training for battle has given them.
And they stare at you. They can’t see your face, but somehow, they seem to look you dead in the eye. You can see their resolve. Their unwavering faith.
Every one of these faces tells you these men will stop at nothing. Until every inch of their body is sacrificed. Until every drop of blood is shed. They’re not fighting a human enemy. Only death can bring their downfall.
The man who’s not afraid of dying has nothing left to lose. He can only gain.
There is nothing scarier to look at than that. The Spartans had already won the battle before it began. Not the battle of bodies, but the battle of the minds.
Once you’ve lost that, the outcome of the fight only matters in history books.
