If there is one occurrence that many people remember from antiquity, it is that three hundred soldiers from the ancient Greek city-state of Sparta once stood against the much larger army of the Persian king Xerxes.1 This is partly the result of its many depictions in pop culture, including the well-known fantastical – and fairly problematic – retelling in the movie 300 from 2006.2 The second Greco-Persian war, which occurred in the beginning of the fifth century BCE and that saw the aforementioned heroics of the Spartans, was a time of military savvy, masterful intrigue, and uncountable tears. But today I want to focus on one specific aspect, a single word even. I am concerned here with a term that the ancient historian Herodotus uses to describe the thought process of the Spartan king Leonidas I when the latter send most of the other Greeks soldiers away – yes, there were other Greeks present! – and prepared his Spartans for their last stand. That word is τάξις (taxis).3 And Herodotus’ metaphorical use of what ultimately was just a mere technical term, can inform us about the martial ideologies of Greece in that time.