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
Battle of Thermopylae (191 BC) only the Aetolian League actually joined forces with Antiochus; other states either remained neutral or sided with the Romans. Antiochus managed to capture some cities in Greece, but was unable to obtain reinforcements from Asia before in 191 BC a large Roman army under the consul Manius Acilius Glabrio crossed from Italy and advanced on his position. Knowing he was outnumbered around 2:1 by the approaching Roman army, Antiochus hoped to use the narrow pass at Thermopylae to his advantage, taking inspiration from the earlier Greek city-states' stand against the much larger Persian army at the Battle of Thermopylae (480