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Battle of Thermopylae

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Battle of Thermopylae
Part of the Greco-Persian Wars
Thermopylae ancient coastline large.jpg
The site of the battle today:
the road to the right is built on reclaimed land
and approximates the 480 BC shoreline.
Date August 7[1] or September 8–10,[2] 480 BC
Location Thermopylae, Greece
Result Persian victory.a[›]
Persians gain control of Boeotia and march for Athens.
Greek city-states Persian Empire
Commanders and leaders
Leonidas I  ,
Xerxes I of Persia,
5,200+ (Herodotus)
7,400+ (Diodorus)
11,200 (Pausanias)
2,600,000 (Herodotus)[3]
~800,000 (Ctesias)
70,000–300,000 (modern estimates)b[›]
Casualties and losses
1,000 to 4,000 (Herodotus)[4] ~20,000 (Herodotus)[5]

The Battle of Thermopylae, 480 BC,[6] was fought between an alliance of Greek city-states, led by Sparta, and the Persian Empire of Xerxes I. It took place at the pass of Thermopylae.[7]

The battle was the climax of the second Persian invasion of Greece. It took place over three days, at the same time as the naval Battle of Artemisium.


The Persian invasion was a delayed response to the defeat of the first Persian invasion of Greece. This was ended by the Athenian victory at the Battle of Marathon. Xerxes amassed a huge army and navy, and set out for the second time to conquer all of Greece.[8]

The preparation

The Athenian general Themistocles suggested the Greek allies should block the Persian army at the pass of Thermopylae, and block the Persian navy at the Straits of Artemisium.

A Greek force of about 7,000 men marched north to block the pass in the summer of 480 BC. The huge Persian army arrived at the pass in late August or early September.

The battle

Vastly outnumbered, the Greeks held off the Persians for seven days in total (including three of battle), before the rear-guard was annihilated in one of history's most famous last stands.

During two full days of battle, the small force led by King Leonidas I of Sparta blocked the only road by which the massive Persian army could pass. After the second day of battle, a local resident named Ephialtes betrayed the Greeks by revealing a small path that led behind the Greek lines. Aware that his force was being outflanked, Leonidas dismissed the bulk of the Greek army, and remained to guard the rear with 300 Spartans, 700 Thespians (who refused to leave), 400 Thebans and perhaps a few hundred others. Most of them were killed.

The pass at Thermopylae was thus opened to the Persian army according to Herodotus, at the cost to the Persians of up to 20,000 fatalities.[9] The Greek rearguard meanwhile, was annihilated, with a probable loss of 2,000 men, including those killed on the first two days of battle.[8]p397[10]p148

The Greek navy

After this engagement, the Greek navy at Artemisium received news of the defeat at Thermopylae. Since their strategy required both Thermopylae and Artemisium to be held, and given their losses, the Greek navy decided to withdraw to Salamis. The Persians then captured the evacuated Athens. During the battle the Greek navy lured the Persians into a narrow pass and obliterated at least 200 Persian war ships, thanks to Themistocles.

Seeking a decisive victory over the Allied fleet, the Persian fleet attacked, but were defeated at the Battle of Salamis in late 480 BC. Fearing to be trapped in Europe, Xerxes withdrew with much of his army to Asia, leaving Mardonius to complete the conquest of Greece. The following year, however, saw a Greek army decisively defeat the Persians at the Battle of Plataea, thereby ending the Persian invasion.

Both ancient and modern writers have used the Battle of Thermopylae as an example of the power of a patriotic army of freemen defending native soil. The performance of the defenders at the battle of Thermopylae is also used as an example of the advantages of training, equipment, and good use of terrain as force multipliers and has become a symbol of courage against overwhelming odds.

Related pages


  1. Lemprière, p. 10
  2. Greswell, p. 374
  3. Herodotus VII, 186
  4. Herodotus VIII, 25
  5. Herodotus VIII, 24
  6. pronounced /θərˈmɒpɨliː/, thər-MOP-i-lee; Greek: Μάχη τῶν Θερμοπυλῶν, Machē tōn Thermopylōn
  7. means 'The Hot Gates'
  8. 8.0 8.1 Holland, Tom 2006. Persian fire: the first world empire and the battle for the West. New York: Doubleday. ISBN 0385513119.
  9. Herodotus VIII, 24
  10. Lazenby J.F. 1993. The defence of Greece 490–479 BC. Aris & Phillips. ISBN 0-85668-591-7

Coordinates: 38°48′0″N 22°32′0″E / 38.8°N 22.533333°E / 38.8; 22.533333