Lessons from King Leonidas and the 300 Spartans: Life Hacks, Mindset Hacks, and Life Lessons

Start hereThe story is told as the stand of the 300 Spartans. Yet Herodotus names Greek contingents at the pass adding up to about 5,200. So who were the others, and why do we remember only 300?

01First, what happened

The main ancient account is Herodotus, Histories, Book 7. Here is the battle in brief.

When	480 BC. Herodotus says Xerxes let four days go by, expecting the Greeks to leave, and attacked on the fifth; the fighting lasted three days
Where	Thermopylae, a narrow pass in central Greece between a steep hillside and the sea
Greek force	Herodotus names contingents adding up to about 5,200, plus the Opuntian Locrians, whom he does not count. The later historian Diodorus gives figures that come to about 7,400. Britannica puts the Greek army at about 7,000 men
Persian force	Herodotus gives 2,641,610 fighting men, with as many again in camp followers. Britannica gives modern estimates of anywhere from 70,000 to 300,000
How it ended	A local man told Xerxes about a path over the mountain; Persian troops went round it and the Greeks were surrounded
Result	A Persian victory. The Persians went on to take Athens and set fire to the Acropolis. The war turned at Salamis (480 BC) and Plataea (479 BC)

Why was the force so small? The Spartans sent Leonidas ahead and meant to follow in full strength once the festival of the Carneia was over. The other allies planned the same, because the Olympic festival fell at the same time.

They did not expect the fight at Thermopylae to be decided so soon.

5,200	Greeks in Herodotus's named contingents, plus the Locrians he does not count
7,400	Greeks in Diodorus's figures
700	Thespians who stayed by choice and died
70,000–300,000	Modern estimates of the Persian army given by Britannica (Herodotus says 2,641,610 fighting men)
3 days	Of fighting, after four days of waiting

From Herodotus, Diodorus and Britannica.

02Who stayed to the end

When the path was betrayed, most of the allies left or were sent away. Herodotus is specific about who remained.

The Thespians stayed by choice. There were 700 of them, under their commander Demophilos, and they stayed behind and died with the Spartans. Herodotus records the name of the Thespian who won most honour: Dithyrambos, son of Harmatides.

The Thebans did not. The Thebans, Herodotus says, stayed against their will, because Leonidas kept them as hostages. If the story is about choosing to stand, the Thespians have as good a claim to it as anyone.

The helots had no choice either. Helots were the enslaved population whose labour left Spartan citizens free for war. Plutarch says the helots farmed the Spartans’ land for them.

Herodotus mentions helots at the pass twice. A Spartan named Eurytus had his helot lead him into the fighting. And after the battle, visitors who came to look at the dead saw helots among them.

He does not say how many there were. The full-time training the story admires rested on other people’s forced work. In our reading, the discipline and the coalition are worth keeping; the whole package is not.

03Life hacks

These lessons are our reading of Herodotus’s account, not rules the Spartans wrote down.

1. Prepare before the hard day, not during it

Xerxes sent a horseman to look at the Greek camp. He saw some men exercising and others combing their long hair, and Xerxes took it for foolishness.

The exiled Spartan king Demaratus told him it was a custom: Spartans tend to their hair whenever they are about to risk their lives.

Preparation often looks like routine from the outside. The part worth borrowing is the unglamorous one: ordinary preparation, done before the day that counts.

2. Choose ground where your disadvantage matters least

The Greeks chose to hold a narrow pass rather than meet the Persian army on open ground. Herodotus says the Persians gained nothing there. They were fighting in a narrow passage, with shorter spears than the Greeks, and could not use their greater numbers.

When you are outnumbered or short of resources, where you compete can matter as much as effort.

3. Know what you are good at

Herodotus describes the Spartans as “men perfectly skilled in fighting opposed to men who were unskilled.” Their advantage was training, and they fought in the way that made the most of it.

The everyday version is to know which of your skills are real, and to lean on those.

4. Settle the rule before the moment

Demaratus explained Spartan discipline to Xerxes as obedience to law. In Macaulay’s translation, the Spartans are “though free, yet they are not free in all things, for over them is set Law as a master.”

He added that they fear this law more than Xerxes’s own people fear him. The law, he said, tells them not to run from battle however many men they face, but to stay at their post.

Discipline, in this picture, is less about willpower in the moment. It is a rule settled before the moment arrives.

5. Keep a sense of humour under pressure

Herodotus reports that a Spartan called Dienekes was said to be the bravest man of all. Told that the Persian arrows would hide the sun, he called it good news, “for if the Medes obscured the light of the sun, the battle against them would be in the shade and not in the sun.”

It comes from Herodotus rather than a later collection of sayings, and it is a joke.

04Mindset hacks

1. Mixed motives can still be real

Herodotus gives a less tidy picture of Leonidas’s choice than the later sayings do. In his view, Leonidas held that going away was not honourable, and that staying would leave a great name behind him.

He reports an oracle that either Sparta would be destroyed or a Spartan king would die. He thinks, too, that Leonidas sent the allies away partly because he wanted glory for himself above all the other Spartans.

Real sacrifice can come with mixed motives, and it can still be real.

2. Let go of people who do not want to stay

Herodotus believed Leonidas sent most of the allies away; he himself did not leave. Leonidas saw that the allies had lost heart and did not want to face the danger to the end, so he ordered them to leave.

Herodotus says he fell in the fighting on the last day, “having proved himself a very good man.” Herodotus adds that he was told the names of all three hundred Spartans.

In our reading, letting people leave, and being clear about why you stay, is a way of knowing the limits of what you can ask of others.

3. Courage comes after the fear

The Greeks were afraid, and Herodotus says so. When the Persians came near, they were frightened and talked about retreating.

Courage in this story is not the absence of fear. It is what they did after that talk.

05Life lessons

1. A betrayal for a reward

The Greek position was lost because a local man hoped to be paid for what he knew. Herodotus names him as Ephialtes, son of Eurydemos, a Malian, who came to Xerxes hoping for a very great reward.

A price was later put on his head. He was killed later, for a different reason, by a man of Trachis named Athenades.

Herodotus also records another version, which named two other men as the guides. He says he “can by no means accept” it.

2. A coalition, not a lone stand

The force at the pass was a coalition: Spartans, Tegeans, Mantineans, Arcadians, Corinthians, men of Phlius and Mycenae, Thespians, Thebans, Phocians and Locrians. They were organised by companies as well as by peoples, and they fought each in turn.

Demaratus’s description of the Spartans makes the same point about working together:

“So also the Lacedemonians are not inferior to any men when fighting one by one, and they are the best of all men when fighting in a body.” — Herodotus, Histories 7.104, spoken by Demaratus to Xerxes, in G. C. Macaulay’s translation.

3. Do it as well on the second day

For two days the Persians attacked and got nowhere. On the second day, Herodotus says, they came on expecting the defenders to be worn out. They found nothing different from the first day, and pulled back.

Persistence here looked like doing the same hard thing as well on the second day as on the first.

4. Change tactics, not commitments

The Spartans varied their tactics. Herodotus describes them turning their backs and pretending to run. When the Persians came after them, shouting and clashing their arms, they turned to face them.

On the last day, knowing they were surrounded, they changed again and advanced much further than before into the wider part of the pass. You can change tactics without changing your commitments.

5. Honour over money

One line in Herodotus about fighting for honour rather than money is not about Spartans at all. It comes from a Persian, Tigranes son of Artabanos in Macaulay’s translation (Histories 8.26).

He hears that the prize at the Olympic Games is only an olive wreath. He says: “what kind of men are these against whom thou hast brought us to fight, who make their contest not for money but for honour!”

6. The stand bought time, not victory

Thermopylae was a defeat. What the stand bought was time and an example. The sacrifice mattered, and it did not by itself save anything.

That is a more useful shape for a lesson than the version where courage is rewarded straight away.

06The famous sayings, and where they come from

Much of the picture people carry today comes from the film 300 (2006), which is fiction built on the history rather than a record of it. The best-known one-liners come from somewhere else again: later collections of sayings.

Plutarch lived around 45–120 CE, so he was writing some five to six centuries after the battle. His collections are where these lines are found:

• “Come and take them.” In Plutarch’s collection of Spartan sayings, when Xerxes wrote “Hand over your arms,” he answered, “Come and take them.” Herodotus, the main ancient account, does not include it.
• Dying for Greece. The same collection has Leonidas turn down an offer from Xerxes: “for me to die for Greece is better than to be the sole ruler over the people of my race.”
• “Not how many, but where.” Plutarch’s collection gives it to a later Spartan king, Agis, son of Archidamus. The Loeb editor identifies him as Agis II, who ruled from 427 to 401 BC, and adds that some sayings in that section belong to the younger Agis III.

That last saying fits the story, even though it was not said at Thermopylae: “the Spartans did not ask ‘how many are the enemy,’ but ‘where are they?’”

The best-known line about Spartan self-sacrifice is not from Thermopylae either:

“Another, as she handed her son his shield, exhorted him, saying, ‘Either this or upon this.’” — Plutarch, Moralia, “Sayings of Spartan Women” 16, trans. F. C. Babbitt.

Plutarch gives it to an unnamed mother. The Loeb editor notes that the anthology of Stobaeus quotes Aristotle giving it to Gorgo, Leonidas’s wife, and that it is often spoken of as a general Spartan custom.

300 men held the pass	Herodotus's contingents come to about 5,200, plus the Locrians.
The stand saved Greece	It was a Persian victory; Athens was taken, and the war turned at Salamis and Plataea.
The Spartans fought alone	Herodotus lists a coalition from across Greece, and the 700 Thespians stayed to the end.
“Either this or upon this” was said at Thermopylae	Plutarch gives it to an unnamed mother; Stobaeus's anthology quotes Aristotle giving it to Gorgo, Leonidas's wife.

07The epitaph

Herodotus records three inscriptions at the pass. One was for the whole force:

Here once, facing in fight three hundred myriads of foemen, / Thousands four did contend, men of the Peloponnese.

Another was for the Spartans alone:

Stranger, report this word, we pray, to the Spartans, that lying / Here in this spot we remain, faithfully keeping their laws. — Herodotus, Histories 7.228, trans. G. C. Macaulay

Herodotus says the Amphictyons put up the inscriptions. Their councillors had their seats at Anthela, beside the pass. He names the poet Simonides only as the author of a third, for the seer Megistias.

The Spartan couplet mentions no defiance and no glory. It says only that they kept their laws, which matches the law Demaratus described to Xerxes.

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How we checked this · Last checked October 2026

• The battle, the contingents, who stayed and the epitaph come from Herodotus, Books 7 and 8, in G. C. Macaulay's translation on Project Gutenberg. We searched the whole volume (Books 5 to 9) for "Come and take them" and did not find it.
• Diodorus's figures were read in the Loeb translation on LacusCurtius; Plutarch's sayings, the editor's notes and the Life of Lycurgus in the same collection.
• Modern estimates of the two armies, and the dates of Salamis and Plataea, follow Britannica. Plutarch's dates follow the Stanford Encyclopedia of Philosophy.
• The ancient totals for the Greek force differ, so the page gives each. Herodotus gives no number for the helots.

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