The Battle of Mycale (; Machē tēs Mykalēs) was one of the two major battles (the other being the Battle of Plataea) that ended the second Persian invasion of Greece during the Greco-Persian Wars. It took place on or about August 27, 479 BC on the slopes of Mount Mycale, on the coast of Ionia, opposite the island of Samos. The battle was fought between an alliance of the Greek city-states, including Sparta, Athens and Corinth, and the Persian Empire of Xerxes I.
The previous year, the Persian invasion force, led by Xerxes himself, had scored victories at the battles of Thermopylae and Artemisium, and conquered Thessaly, Boeotia and Attica; however, at the ensuing Battle of Salamis, the allied Greek navies had won an unlikely victory, and therefore prevented the conquest of the Peloponnese. Xerxes then retreated, leaving his general Mardonius with a substantial army to finish off the Greeks the following year.
In the summer of 479 BC, the Greeks assembled an army, and marched to confront Mardonius at the Battle of Plataea. At the same time, the allied fleet sailed to Samos, where the demoralised remnants of the Persian navy were based. The Persians, seeking to avoid a battle, beached their fleet below the slopes of Mycale, and, with the support of a Persian army group, built a palisaded camp. The Greek commander Leotychides decided to attack the Persians anyway, landing the fleet's complement of marines to do so.
Although the Persian forces put up stout resistance, the heavily armoured Greek hoplites again proved themselves superior in combat, and eventually routed the Persian troops, who fled to their camp. The Ionian Greek contingents in the Persian army defected, and the camp was assailed and a large number of Persians slaughtered. The Persian ships were then captured and burned. The complete destruction of the Persian navy, along with the destruction of Mardonius's army at Plataea (allegedly on the same day as the Battle of Mycale), decisively ended the invasion of Greece. After Plataea and Mycale, the allied Greeks would take the offensive against the Persians, marking a new phase of the Greco-Persian Wars. Although Mycale was in every sense a decisive victory, it does not seem to have been attributed the same significance (even at the time) as, for example, the Athenian victory at the Battle of Marathon or even the Greek defeat at the Battle of Thermopylae.
Background
The Greek city-states of Athens and Eretria had supported the unsuccessful Ionian Revolt against the Persian Empire of Darius I in 499-494 BC. The Persian Empire was still relatively young, and prone to revolts amongst its subject peoples. Moreover, Darius had spent considerable time extinguishing revolts against his rule. The Ionian revolt threatened the integrity of his empire, and Darius thus vowed to punish those involved (especially those not already part of the empire). Darius also saw the opportunity to expand his empire into the fractious world of Ancient Greece. A preliminary expedition under Mardonius, in 492 BC, to secure the land approaches to Greece ended with the re-conquest of Thrace and forced Macedon to become a client kingdom of Persia. An amphibious task force was then sent out under Datis and Artaphernes in 490 BC, successfully sacking Naxos and Eretria, before moving to attack Athens. However, at the ensuing Battle of Marathon, the Athenians won a remarkable victory, which resulted in the withdrawal of the Persian army to Asia.
Darius therefore began raising a huge new army with which he meant to completely subjugate Greece. However, he died before the invasion could begin. The throne of Persia passed to his son Xerxes I, who quickly resumed the preparations for the invasion of Greece, including building two pontoon bridges across the Hellespont. In 481 BC, Xerxes sent ambassadors around Greece asking for earth and water as a gesture of their submission, but making the very deliberate omission of Athens and Sparta (both of whom were at open war with Persia). Support thus began to coalesce around these two leading states. A congress of city states met at Corinth in late autumn of 481 BC, and a confederate alliance of Greek city-states was formed (hereafter referred to as 'the Allies'). This was remarkable for the disjointed Greek world, especially since many of the city-states in attendance were still technically at war with each other.