Leonidas I of Sparta

Definition and stakes

The Junior Classics, Volume 7: Stories of Courage and Heroism

Leonidas had already made up his mind that the expedition would probably be his death, perhaps because a prophecy had been given at the Temple at Delphi that Sparta should be saved by the death of one of her kings of the race of Hercules. He was allowed by law to take with him 300 men, and these he chose most carefully, not merely for their strength and courage, but selecting those who had sons, so that no family might be altogether destroyed. These Spartans, with their helots or slaves, made up his own share of the numbers, but all the army was under his generalship.
Source: Gutenberg

Baron Edward Bulwer Lytton Lytton Athens: Its Rise and Fall, Book III

The laws of the Spartans forbade them to fly from any enemy, however numerous, and Leonidas did not venture to disobey them. Perhaps his resolution was strengthened by an oracle of that Delphi so peculiarly venerated by the Dorian race, and which foretold either the fall of Sparta, or the sacrifice of a Spartan king of the blood of Hercules. To men whose whole happiness was renown, life had no temptation equal to such a death!
Source: Gutenberg

Rufus B. Richardson Vacation days in Greece

As to the heroic deed itself, the view that Leonidas threw away his own life and that of the four thousand, that it was magnificent but not strategy, not war, does not take into account the fact that Sparta had for nearly half a century been looked to as the military leader of Greece. It was audacious in the Athenians to fight the battle of Marathon without them, and they did so only because the Spartans did not come at their call. Sparta had not come to Thermopylæ in force, it is true
Source: Gutenberg

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