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The Persian Wars

Herodotus counted 192 Athenians dead at Marathon in 490 BCE, and the mound raised over them still stands on the plain.

The Persian heartland and the Greek world. 1 Sardis, 2 Miletus, 3 Susa, 4 Persepolis, 5 Babylon, 6 Athens. Dashed line: the Royal Road from Sardis to Susa, about 2,700 km, as reconstructed from Herodotus (approximate). A Aegean, B Persian Gulf, C Mediterranean.

The largest empire of its time

In 550 BCE Cyrus the Great founded the Achaemenid Persian empire, and within a few decades it ran from the Aegean coast of Turkey to the Indus. Under Darius I it was divided into provinces called satrapies, each paying tribute in silver or goods. Darius improved a network of roads; the best known, the Royal Road from Sardis to Susa, had 111 posting stations with fresh horses. Mounted couriers could carry a message in days that took travellers about three months on foot. Herodotus wrote that nothing mortal travels faster than these Persian messengers, and that neither snow nor rain nor heat nor darkness stops them. A version of that line is carved over the old General Post Office in New York.

A revolt in Ionia

The Greek cities of Ionia, on the coast of Asia Minor, were Persian subjects. In 499 BCE Miletus led them in revolt, and the next spring Athens sent 20 ships to help. The rebels burned Sardis, a provincial capital, in 498 BCE. Persia crushed the revolt and sacked Miletus in 494 BCE. Darius now had a reason to punish Athens, and in 490 BCE a Persian fleet crossed the Aegean and landed its army on the plain of Marathon, about 40 km from Athens.

Marathon, 490 BCE

The Greek Ministry of Culture’s Marathon exhibition gives about 9,000 Athenians and 1,000 Plataeans against a larger Persian force. The Athenian general Miltiades thinned the centre of his line and strengthened the wings. When the Persian centre pushed forward, the Greek wings beat their opponents, then turned inward and closed on the centre. Herodotus gives the dead as 192 Athenians and 6,400 Persians; he does not say how many Plataeans fell. The Athenian figure is probably the real count of bodies buried in the mound; the Persian figure is much less certain. The army then marched back to Athens fast enough to face the Persian fleet when it arrived off the city, and the Persians sailed home.

BackgroundHerodotus says that before the battle the Athenians sent a runner, Pheidippides, to ask Sparta for help, and that he reached Sparta, roughly 240 km away, on the day after he left. The more famous tale, of a runner who carried news of the victory from Marathon to Athens and died after announcing it, appears only in writers centuries later. That later legend inspired the marathon race at the first modern Olympics in 1896. The distance was fixed at 42.195 km after the 1908 London Games.
BattleGreek leaderResult
Marathon, 490 BCEMiltiadesGreek win
Thermopylae, 480 BCELeonidasPersian win after three days
Artemisium, 480 BCEEurybiades, ThemistoclesDrawn sea battle
Salamis, 480 BCEEurybiades, ThemistoclesGreek win at sea
Plataea, 479 BCEPausanias of SpartaGreek win; invasion ends

Xerxes invades, 480 to 479 BCE

Darius died before he could try again, and his son Xerxes led a far larger invasion in 480 BCE, crossing the Hellespont on two bridges of boats. Athens had prepared. In 482 BCE, on the advice of Themistocles, it had spent the profits of a rich silver strike at Laurion on a fleet of triremes, warships rowed by about 170 men in three banks. At the narrow pass of Thermopylae, King Leonidas of Sparta with his 300 Spartans and several thousand allies held the Persian army for three days before they were surrounded. Xerxes then burned Athens, whose people had fled to Salamis and other places. In September 480 BCE Themistocles drew the Persian fleet into the narrow strait of Salamis, where its numbers counted for little, and the Greeks won. The next year a Greek army led by Sparta defeated the Persian land forces at Plataea.

After the wars

In 478 BCE Athens and many island and coastal cities formed the Delian League to keep fighting Persia. Members paid ships or money into a treasury on the island of Delos. Over time Athens turned the league into an empire. In 454 BCE the treasury moved to Athens, and league money helped pay for the Parthenon. Sparta and its allies grew alarmed, and the rivalry ended in the Peloponnesian War of 431 to 404 BCE, which Athens lost. Most of what we know about the Persian Wars comes from Herodotus of Halicarnassus, who wrote his Histories a generation later and whom Cicero called the father of history.

Ancient army sizes are the weakest numbers in this unit. Herodotus put Xerxes’ army in the millions; modern historians usually think it was a small fraction of that.
  • 550 BCE: Cyrus the Great founds the Persian empire
  • 499 BCE: Ionian Revolt begins
  • 490 BCE: Battle of Marathon
  • 482 BCE: Athens builds a fleet with Laurion silver
  • 480 BCE: Thermopylae, Artemisium and Salamis
  • 479 BCE: Battle of Plataea
  • 478 BCE: Delian League founded
  • 454 BCE: League treasury moved to Athens
SatrapyProvince of the Persian empire
Royal RoadPersian road from Sardis to Susa, 111 stations
MiltiadesAthenian general at Marathon
LeonidasSpartan king who held Thermopylae
ThemistoclesBuilt the Athenian fleet; won at Salamis
TriremeWarship rowed by about 170 men in three banks
Delian LeagueAlliance led by Athens from 478 BCE
HerodotusHistorian of the Persian Wars, "father of history"
  1. Who founded the Achaemenid Persian empire in 550 BCE?
    • Cyrus the Great
    • Xerxes
    • Darius III
  2. What event gave Darius a reason to attack Athens?
    • Athens helped the Ionian Revolt
    • Athens refused to pay tribute
    • Athens invaded Egypt
  3. How did the Greeks win at Marathon?
    • Strong wings closed on the Persian centre
    • Cavalry charge
    • A night attack on the ships
  4. What paid for the Athenian fleet of 480 BCE?
    • Silver from Laurion
    • Persian gold
    • Spartan taxes
  5. Why did the strait of Salamis help the Greeks?
    • The narrow water cancelled Persian numbers
    • It was too shallow for rowing
    • The Persians had no ships there
  6. Which battle ended the Persian land invasion in 479 BCE?
    • Plataea
    • Thermopylae
    • Marathon
  7. Where was the Delian League treasury first kept?
    • On the island of Delos
    • In Sparta
    • In Sardis
  8. Herodotus gives 6,400 Persian and 192 Athenian dead at Marathon. Roughly how many Persians died for each Athenian? (nearest whole number)
  9. A trireme needed about 170 rowers. How many rowers for 200 triremes?
  10. Put these in order, oldest first.
Sources: Hellenic Ministry of Culture, "2500 years: The Battle of Marathon" (2500years.culture.gov.gr); Britannica, "Greco-Persian Wars" and "Delian League"; Brown University Joukowsky Institute, "Delian League"; Livius.org, "Royal Road"; Herodotus, Histories 5.97 to 6.120, 7.144, 8.98; Smithsonian National Postal Museum on the New York post office inscription.
Sources for this course (13)
  • The Met Heilbrunn Timeline essays "The Roman Republic" and "The Roman Empire (27 B.C. to 393 A.D.)" (metmuseum.org/essays)
  • British Museum collection records (Vindolanda birthday invitation, ostraka, Ilam pan)
  • Britannica: "The reforms of Cleisthenes", "Cleisthenes of Athens", "Greco-Persian Wars", "Delian League"
  • Hellenic Ministry of Culture exhibition "2500 years: The Battle of Marathon" (2500years.culture.gov.gr)
  • English Heritage: "History of Hadrian's Wall" and "Hadrian's Wall facts and FAQs" (english-heritage.org.uk)
  • MIT News 2023 "Riddle solved: Why was Roman concrete so durable?" and Seymour, Masic et al., Science Advances 2023 (doi 10.1126/sciadv.add1602)
  • MIT DMSE 2025 on the Pompeii building site
  • University of Chicago LacusCurtius: "The Life and Works of Frontinus" and Encyclopaedia Romana "Frontinus and the Quinaria" (penelope.uchicago.edu)
  • Brown University Joukowsky Institute course notes "Delian League"
  • Lumen Learning / SUNY world history "Odoacer and the Fall of Rome"
  • Livius.org "Royal Road"
  • EBSCO Research Starters "Legislation of Solon". Map coastlines: Natural Earth 1:110m (public domain)
  • routes are hand-placed approximations.

Checked: 2026-10-17