Greece in the 5th century BC BC, the Greeks, under the Spartan Pausanias, defeated the Persian army at Plataea. The Athenian fleet then turned to chasing the Persians out of the Aegean Sea, defeating their fleet decisively in the Battle of Cape Mycale, and in 478 BC the Athenian fleet captured Byzantium. In the course of doing so Athens enrolled all the island states and some mainland allies into an alliance, called the Delian League because the League's treasury was kept on the sacred island of Delos. The Spartans, although they had taken part in the war, withdrew from any further involvement, allowing Athens to become
Thermopylae her older local cults, and perhaps a reference to the gates of Hades. A Greek myth mentioned that Heracles had jumped into the river in an attempt to wash off the Hydra poison infused in the cloak which he could not take off. The river has become hot and stayed that way ever since. Thermopylae is primarily known for the battle that took place there in 480 BC, in which an outnumbered Greek force probably of seven thousand (including the famous 300 Spartans, 500 warriors from Tegea, 500 from Mantinea, 120 from Arcadian Orchomenos, 1000 from the rest of Arcadia,