bravery of the Spartans, and as they saw their comrades falling around them, they turned to flee. Then their officers drove them back with lashes.
For two days, the terrible slaughter never ceased, and Xerxes was almost ready to leave the pass to its brave defenders, so hopeless seemed the task of taking it.
But that night, a Greek named Ephialtes came to the great king, and for a large sum of money, he offered to show the Persians a path which led over the hill down to the pass of Thermopylae. The path was the tiny track that was guarded by the Phocians.
The offer of the traitor was at once accepted, and at midnight Xerxes sent his officer Hydarmes, at the head of his Immortals, to follow Ephialtes.
'All night long they followed the path with the mountains on the right and on the left. The day was dawning when they reached the peak of the mountain, and there the thousand Phocians were keeping watch and guarding the pathway. While the Persians were climbing the hill, the Phocians knew not of their coming, for the whole hill was covered with oak trees, but they knew what had happened when the Persians reached the summit. Not a breath of wind was stirring, and they heard the trampling of their feet as they trod on the fallen oak leaves.'
No sooner had they heard than the arrows of the Immortals were pouring in upon them. They fell back, leaving the pathway free, while they hastily put on their armour and prepared to fight to the death. They did not dream that the Immortals had no wish to fight with them. But so it was, for the Persians took no more notice of them, but finding the hill path free, they sped downward to the pass to take the Spartans in the rear. The Phocians were left alone on the heights almost before they were aware.
Leonidas had heard of the treachery of Ephialtes soon after the traitor left the Persian king. He knew that to try to hold the pass now that he would be attacked in the rear
