Demaratus replied, “O King, deal with me as with a liar if everything fall not out even as I have said.”
After this, Xerxes allowed four days to pass, thinking that perhaps the Greeks would come to their senses and flee. “But on the fifth day, seeing that they were not departed, but as it seemed to him, were full of impudence and folly, he grew angry, and sent against them the Medes and the Cissians, giving them a command that they should take these Greeks alive and bring them before him. But when these men came up and fell upon the Greeks, many of them were slain. Then others came up into their places and ceased not from fighting, though indeed they suffered a very grievous slaughter, so that it was manifest to all men, and more especially to the King, that though he had very many that bore arms, yet had he but few men of war. And this battle endured throughout the whole day.”
For two days the troops of Xerxes, even his great Ten Thousand, who were known as the Immortals, hurled themselves upon the Greeks, but they accomplished nothing, for they fought in a narrow place, where their greater numbers were of no help to them; and their spears were shorter than those of the Greeks, so that they were easily thrust through before they could come close enough to harm an enemy. Three times, it is said, while his troops were being driven backward, did Xerxes spring in despair from his throne at the sight of the peril of his army.
But on the evening of the second day there came to the camp of the Persian King a man named Ephialtes. On being ushered into the presence of Xerxes, this man admitted that he was a Greek, and proposed that for a great reward he should lead the Persian army over the hidden mountain path, and bring them to the rear of the Greek defenders. Of course Xerxes accepted the offer, and sent off one of his generals with a detachment to follow Ephialtes over the mountain path. In the morning the Phocians who had been set to guard this path were awakened by the sound of rustling in the underbrush and rushed from their camp only to see a detachment of Persian soldiers close upon them. Resolving to sell their lives dearly, they fled to the top of the mountain, where they thought that they might have the advantage of position over their enemies; but the Persians, paying no attention to them, passed on down the mountain to fall upon the brave defenders of Thermopylae.
The Greeks in the pass knew when morning dawned of the danger that awaited them, for Megistias the soothsayer told of it, and certain messengers running before the Persians confirmed his prophecy. “Then the Greeks held a council, considering what they should do; and they were divided; for some would not leave the post where they had been set, and others were very eager to depart. And when the council was broken up, some departed, going each to their own cities, and others made ready to abide in the pass with Leonidas. Some say, indeed, that Leonidas sent away them that departed, having a care for their safety; but it did not become him and the Spartans that were with him, he said, to leave their post that they had come to keep at the first. And indeed it seems fit to be believed that Leonidas, seeing that the others were faint-hearted and would not willingly abide the peril, bade them go, but that he himself held it to be a shameful thing to depart. For he knew that he should get for himself great glory by abiding at his post, and that the prosperity of Sparta should not be destroyed.”
The allies, therefore, with the exception of the Thespians and the Thebans, departed, and the brave remainder prepared themselves for their death. Hitherto, Leonidas had stood on the defensive in order to spare the lives of his men, but now, knowing that death must come, he desired only to work as great havoc among the Persians as possible, and he therefore marched his men out before the wall and fell upon the vanguard of the Persian army. It does not seem strange that the hired soldiers should have feared to meet this little band of Greeks, and indeed it is told that the Persian captains were obliged to go behind their troops and with whips scourge them to the fight. Many of the Persians were forced into the sea and so died; some were trodden under foot, and thousands fell by the hands of the Greeks. But it was not only the Persians who fell in this fierce struggle; Leonidas was one of the first who was slain, and many other Spartans fell with him.
But the death of their leader did not demoralize the Greeks—it only made them more reckless and more desperate. At length they saw that the end was close at hand; the “Immortals,” who had come in the night over the mountain, had arrived, and were ready to fall upon their rear. Closely pressed by the Persians, they drew back to the narrowest part of the pass, where they had fought on the preceding days, and there made their last stand. Their spears were broken, their swords were dulled; but even had their weapons been still of the best, it would have availed them little, for the Persians, all too well acquainted now with the Greek daring, refused to close with their enemies. In their well-nigh useless armour, which had been hacked from their limbs during their earlier encounters, the Greeks stood on a little hillock and braved the shower of Persian arrows and javelins. By the time the sun went down there remained not one of all the Grecian band, but before their death they had succeeded in slaying twenty thousand of the enemy. Xerxes inquired of Demaratus, in whose word he had come to have more confidence since witnessing the events of the last three days, whether there were many more men at Sparta like these; and when he was told that there were thousands, he realized that perhaps even his mighty army might not be a match for them. That all Greeks were not like the Spartans who had fallen at Thermopylae; that all Greek leaders were not as brave and as devoted as Leonidas—these facts Xerxes did not realize. The struggle which had proved so fatal to so many of his men had shown him that he was not so irresistible, and had thereby done much for the Greeks.
Where the Greeks fell they were buried, and in after years pillars were set up to commemorate their bravery. One, in honor of those who fell before the allies were sent away, bore the words: