Re: Event of the Year
 

487 BC

Athenian Archonship becomes elective by lot from all the citizens, an important milestone in the move towards radical Athenian democracy. There are nine archons and a secretary. Three of the archons have special functions: the basileus, or sovereign; the polemarch (originally a military commander); and the archon eponymous (chief magistrate), who gave his name to the year.

Re: Event of the Year
 

488 BC

The Athenians ostracise Hipparchos for his favouring of appeasement of the Persians.

Re: Event of the Year
 

489 BC

Miltiades, after his great victory at Battle of Marathon, leads a naval expedition to Paros to pay off a private score. However, the expedition is unsuccessful and, on his return, he is fined in a prosecution led by Xanthippus and put in prison where he dies of wounds received at Paros.

Re: Event of the Year
 

490 BC

September — The Battle of Marathon takes place as a Persian army of more than 20,000 men is advised by Hippias to land in the Bay of Marathon, where they meet the Athenians supported by the Plataeans. The Persians are repulsed by 11,000 Greeks under the leadership of Callimachus and Miltiades. Some 6,400 Persians are killed at a cost of 192 Athenian dead. Callimachus, the war-archon of Athens, is killed in the battle. After the battle, the Persians return home.

Re: Event of the Year
 

491 BC

The Greek city of Aegina, fearing the loss of trade, submits to Persia. The Spartan king, Cleomenes I tries to punish Aegina for its submission to the Persians, but the other Spartan king, Demaratus, thwarts him.

Re: Event of the Year
 

492 BC

The first expedition of King Darius I of Persia against Greece commences under the leadership of his son-in-law and general, Mardonius. Darius sends Mardonius to succeed his satrap (governor) in Ionia, Artaphernes, with a special commission to attack Athens and Eretria.

Re: Event of the Year
 

493 BC

The Athenian poet Phrynicus produces a tragedy on the Fall of Miletus. The Athenian authorities ban the play from further production on the grounds of impiety.

Re: Event of the Year
 

494 BC

Having successfully captured several of the revolting Greek city-states, the Persians under Artaphernes lay siege to Miletus. The decisive Battle of Lade is fought at the island of Lade, near Miletus' port. Although out-numbered, the Greek fleet appears to be winning the battle until the ships from Samos and Lesbos retreat. The sudden defection turns the tide of battle, and the remaining Greek fleet is completely destroyed. Miletus surrenders shortly thereafter, and the Ionian Revolt comes to an end.

Re: Event of the Year
 

495 BC

A temple is built on the Circus Maximus, between the Aventine and Palatine hills, in Rome, in honour of the god Mercury.

Re: Event of the Year
 

496 BC

Carthage and Rome make a treaty whereby Roman ships undertake not to trade to the west of Carthage while the Carthaginians undertake not to interfere in Latin politics.