Battle of Plataea other. The Allies initially adopted a strategy of blocking land and sea approaches to southern Greece. Thus, in August 480 BC, after hearing of Xerxes' approach, a small Allied army led by Spartan King Leonidas I blocked the Pass of Thermopylae, while an Athenian-dominated navy sailed to the Straits of Artemisium. Famously, the massively outnumbered Greek army held Thermopylae for three days before being outflanked by the Persians, who used a little-known mountain path. Although much of the Greek army retreated, the rearguard, formed of the Spartan and Thespian contingents, was surrounded and annihilated. The simultaneous Battle of Artemisium, consisting
Battle of Hysiae (417 BC) destroyed the town and fortress of Hysiae and had its male population executed. The campaign is described by the historians Thucydides (5.83.2), who actually fought in the war, and Diodorus Siculus (12.81.1), who wrote in the 1st century BC, over two hundred years later. Thucydides says that the Spartans marched against Argos in the winter of 418–417 BC with all their allies, but failed to take the city of Argos. The Spartans did, however, capture and destroy the Argive town of Hysiae, taking all the male citizens as hostages. The hostages were subsequently killed. With Hysiae destroyed, the Spartans left