Thucydides gives a different order of events; for him the war begins with a sea battle in which the Athenians capture seventy ships, and then follows the siege, which ends in Aigina's capitulation. Argos had assisted Aigina in a war against Epidauros and Athens long before; while after her defeat at Sepeia Argos demanded a fine of 500 talents from Aigina as an atonement for her treachery, and she could not have made this demand if she had not had, or claimed to have, some kind of alliance with her. It is therefore not surprising that the Peloponnesians should attack both Argos and Aigina at the same period. During the period 493-488 there was a war between Athens and Aigina. Aigina on the other hand Medised, and the kings of Sparta, at the request of Athens, took hostages from Aigina to ensure her neutrality during the Persian invasion.