Battle of Thermopylae aware that his force was being outflanked, dismissed the bulk of the Greek army and remained to guard their retreat with 300 Spartans and 700 Thespians, fighting to the death. Others also reportedly remained, including up to 900 helots and 400 Thebans; these Thebans mostly reportedly surrendered. Themistocles was in command of the Greek Navy at Artemisium when he received news that the Persians had taken the pass at Thermopylae. Since the Greek strategy required both Thermopylae and Artemisium to be held, given their losses, it was decided to withdraw to Salamis. The Persians overran Boeotia and then captured the
Themistocles able to travel to a meeting of the Allies, at which he proposed his strategy; with the Athenian fleet fully committed to the defence of Greece, the other Allies accepted his proposals. Thus, in August 480 BC, when the Persian army was approaching Thessaly, the Allied fleet sailed to Artemisium, and the Allied army marched to Thermopylae. Themistocles himself took command of the Athenian contingent of the fleet, and went to Artemisium. When the Persian fleet finally arrived at Artemisium after a significant delay, Eurybiades, who both Herodotus and Plutarch suggest was not the most inspiring commander, wished to sail