Thermopylae means 'Hot Gates,' for the sulphur springs that still steam from the ground here on the southern shore of the Malian Gulf. In 480 BC it was a true gate: a sliver of passable land squeezed between the cliffs of Mount Kallidromon and the sea, so narrow that a small force could hold off a vast one. That was the whole idea. When Xerxes brought an army of perhaps tens of thousands south to conquer Greece, Leonidas took roughly seven thousand allied Greeks to plug the gap — among them his famous personal guard of three hundred Spartans. For two days the narrows did exactly what narrows do. Numbers meant nothing where only a few men could fight abreast.

What broke the stand was not the front of the line but a secret behind it. A local man named Ephialtes showed the Persians a mountain track that looped around the pass, and on the third day Leonidas learned his position had been flanked. He sent most of the allied army home and stayed with his Spartans, a contingent of Thespians who refused to leave, and others, to fight a battle they now knew they could not survive. They died to the last in the choking pass. Herodotus, writing within living memory of the events, recorded it not as a tragedy to be mourned away but as a deliberate, clear-eyed sacrifice — soldiers who chose the law of their city over their own lives.

The reframing began almost immediately. Simonides wrote epigrams for the dead, and by the fourth century BC Greek writers were already describing Thermopylae less as a loss than as a moral triumph — a shift from how the historian Herodotus first set it down. The pass gave the idea its grip. A handful of free men, choosing to stand in a doorway against an empire, was a story too clean and too useful to let fade. It became shorthand for outnumbered courage, for duty over survival, for the small holding the line against the overwhelming.

Europe rediscovered Thermopylae in the 1700s. Richard Glover's 1737 poem 'Leonidas' used the king to model the virtues of a good ruler, and a Dutch poet, Willem van Haren, took up the theme in 1742. During the French Revolution, stage plays put Leonidas before audiences hungry for civic sacrifice. Then, under Napoleon, the painter Jacques-Louis David spent years on his vast 'Leonidas at Thermopylae,' finishing it in 1814 — the king poised and resolute in the moments before the slaughter, an image of patriotism rather than panic. The story bent to fit whoever borrowed it, and almost everyone did.

The pass kept inspiring real battles, not just art. As Greeks prepared to revolt against Ottoman rule, Thermopylae was invoked as a model — the revolutionary Rigas Feraios reached for it in a hymn in 1797. In Texas in 1836, the defenders of the Alamo were being compared to the 300 within weeks of their deaths, and an Austin memorial would cite Thermopylae by 1843. In the twentieth century, the 1962 film 'The 300 Spartans' recast the clash as a Cold War parable, and Steven Pressfield's 1998 novel 'Gates of Fire' insisted on the gore the legend usually smooths over. Today a bronze Leonidas stands near the pass, and the springs still steam. The sea has crept back to reveal a wide plain where the shoreline once nearly met the cliffs — but the words on the stone have not moved at all.