A Greek army led by the Spartan Pausanias routs the Persian land army under Mardonius, ending Xerxes' invasion of Greece.
On that day the Spartans, as the oracle had foretold, gained from Mardonius their full measure of vengeance for the slaying of Leonidas, and the most glorious of victories of all which we know was won by Pausanias, the son of Cleombrotus, who was the son of Anaxandrides.
A Theban force slips into Plataea, an ally of Athens, at night. Thucydides treats this as the start of the war between Athens and Sparta.
a Theban force a little over three hundred strong, under the command of their Boeotarchs, Pythangelus, son of Phyleides, and Diemporus, son of Onetorides, about the first watch of the night, made an armed entry into Plataea, a town of Boeotia in alliance with Athens.
