499 BC

Ionian Revolt

Aristagoras launches the Ionian Revolt against Achaemenid rule

Herodotus says the order to revolt arrived tattooed onto a slave's shaved scalp, hidden until his hair grew back.

A failed siege, then a decision

The Ionian Revolt began in 499 BCE. Aristagoras's Persian-backed expedition against Naxos — 200 triremes, four months of siege — had failed, leaving him exposed to the loss of his position and to demands for the expedition's costs. Herodotus adds a secret message from the detained Histiaeus urging revolt.

He gathered his supporters at Miletus in the second half of 499 BCE and proposed rebellion against Darius. One man argued against it: Hecataeus recited the scale of the Persian empire and warned that Miletus could not win. The group decided to rebel anyway.

Hecataeus, having lost that argument, urged the rebels to secure command of the sea.

The first move was an arrest, not a battle

Aristagoras sent Iatragoras to seize the Persian-supported Greek tyrants still with the returning fleet at Myus, then had the captives handed over to their own cities.

At Miletus he publicly gave up his tyranny — or, in Herodotus's hostile wording, pretended to — and instituted isonomia, political equality, to secure Milesian support.

That is not the same as an Athenian-style democracy: he installed trusted strategoi and retained regional leadership.

How far the revolt actually reached

Envoys went through Ionia to remove other tyrants and to order the cities to appoint their own commanders, turning a Milesian crisis into a regional rebellion. The rebels were individual cities and communities, not a unified Greece.

Athens and Eretria were not involved on day one. Their ships — twenty and five — arrived in 498 BCE.

Herodotus is almost the only narrative source, and his portrayal of Aristagoras acting chiefly from personal fear is debated; scholars also identify broader political and economic grievances.

Sources

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What the sources leave uncertain

The revolt is securely placed in 499 BCE, with modern scholarship favoring the second half of the year; no exact day survives.
Herodotus is the main and almost the only narrative source, and there is no contemporary epigraphic account.
Herodotus’ portrayal of Aristagoras as acting chiefly from personal fear is debated; scholars also identify broader political and economic grievances.
The story that Megabates deliberately warned Naxos is explicitly rejected as implausible by Encyclopaedia Iranica.