The History Of Herodotus Volume 2 of 2
Page: 141204. Of these troops, although there were other commanders also according to the State to which each belonged, yet he who was most held in regard and who was leader of the whole army was the Lacedemonian Leonidas son of Anaxandrides, son of Leon, son of Eurycratides, son of Anaxander, son of Eurycrates, son of Polydoros, son of Alcamenes, son of Teleclos, son of Archelaos, son of Hegesilaos, son of Doryssos, son of Leobotes, son of Echestratos, son of Agis, son of Eurysthenes, son of Aristodemos, son of Aristomachos, son of Cleodaios, son of Hyllos, son of Heracles; who had obtained the kingdom of Sparta contrary to expectation.
205. For as he had two brothers each older than himself, namely Cleomenes and Dorieos, he had been far removed from the thought of becoming king. Since however Cleomenes had died without male child, and Dorieos was then no longer alive, but he also had brought his life to an end in Sicily, 210 thus the kingdom came to Leonidas, both because was of elder birth than Cleombrotos (for Cleombrotos was the youngest of the sons of Anaxandrides) and also because he had in marriage the daughter of Cleomenes. He then at this time went to Thermopylai, having chosen the three hundred who were appointed by law 211 and men who chanced to have sons; and he took with him besides, before he arrived, those Thebans whom I mentioned when I reckoned them in the number of the troops, of whom the commander was Leontiades the son of Eurymachos: and for this reason Leonidas was anxious to take up these with him of all the Hellenes, namely because accusations had been strongly brought against them that they were taking the side of the Medes; therefore he summoned them to the war, desiring to know whether they would send troops with them or whether they would openly renounce the alliance of the Hellenes; and they sent men, having other thoughts in their mind the while.
206. These with Leonidas the Spartans had sent out first, in order that seeing them the other allies might join in the campaign, and for fear that they also might take the side of the Medes, if they heard that the Spartans were putting off their action. Afterwards, however, when they had kept the festival, (for the festival of the Carneia stood in their way), they intended then to leave a garrison in Sparta and to come to help in full force with speed: and just so also the rest of the allies had thought of doing themselves; for it chanced that the Olympic festival fell at the same time as these events. Accordingly, since they did not suppose that the fighting in Thermopylai would so soon be decided, they sent only the forerunners of their force.
207. These, I say, had intended to do thus: and meanwhile the Hellenes at Thermopylai, when the Persian had come near to the pass, were in dread, and deliberated about making retreat from their position. To the rest of the Peloponnesians then it seemed best that they should go to the Peloponnese and hold the Isthmus in guard; but Leonidas, when the Phokians and Locrians were indignant at this opinion, gave his vote for remaining there, and for sending at the same time messengers to the several States bidding them to come up to help them, since they were but few to repel the army of the Medes.