Mardonius (nephew of Darius I) in the context of "Xerxes I"

The Battle of Plataea was the final land battle during the second Persian invasion of Greece. It took place in 479 BC near the city of Plataea in Boeotia, and was fought between an alliance of the Greek city-states (including Sparta, Athens, Corinth and Megara), and the Achaemenid Empire of Xerxes I (allied with Greek states including Boeotia, Thessalia, and Macedon).

At the preceding Battle of Salamis, the allied Greek navy had won an unlikely but decisive victory, preventing the conquest of the Peloponnesus region. Xerxes then retreated with much of his army, leaving his general Mardonius to finish off the Greeks the following year. In the summer of 479 BC, the Greeks assembled a huge army and marched out of the Peloponnesus. The Persians retreated to Boeotia and built a fortified camp near Plataea. The Greeks, however, refused to be drawn into the prime terrain for cavalry around the Persian camp, resulting in a stalemate that lasted eleven days.

Achaemenid Macedonia refers to the period in which the ancient Greek Kingdom of Macedonia was under the reign of the Achaemenid Persians. In 512/511 BC, the Persian general Megabyzus forced the Macedonian king Amyntas I to make his kingdom a vassal of the Achaemenids. In 492 BC, following the Ionian Revolt, the Persian general Mardonius firmly re-tightened the Persian grip in the Balkans, making Macedon a fully subordinate kingdom within the Achaemenid domains and part of its administrative system. Macedonia served the Achaemenid Empire during the Greco-Persian Wars in their invasion of mainland Greece. They regained independence following the defeat and withdrawal of the Achaemenid Empire in 479 BC.

The first Persian invasion of Greece took place from 492 BC to 490 BC, as part of the Greco-Persian Wars. It ended with a decisive Athenian-led victory over the Achaemenid Empire during the Battle of Marathon. Consisting of two distinct campaigns, the invasion of the independent Greek city-states was ordered by the Persian king Darius the Great, who sought to punish Athens and Eretria after they had supported the earlier Ionian Revolt. Additionally, Darius also saw the subjugation of Greece as an opportunity to expand into Southeast Europe and thereby ensure the security of the Achaemenid Empire's western frontier.

The first campaign, in 492 BC, was led by the Persian commander Mardonius, who re-subjugated Thrace and forced Macedon to become a fully subordinate client kingdom within the Achaemenid Empire; it had been a Persian vassal as early as the late 6th century BC—probably in 512 BC. However, further progress was prevented when Mardonius' fleet was wrecked in a storm off the coast of Mount Athos. The following year, having demonstrated his intentions, Darius sent envoys to all parts of Greece, demanding their submission. He received it from almost all of them, but not from Athens and Sparta, both of which executed the envoys sent to them. With Athens still defiant, and Sparta now effectively at war with the Persians, Darius ordered a further military campaign for the following year.

Datis or Datus (Greek: Δάτης, Old Iranian: *Dātiya-, Achaemenid Elamite: Da-ti-ya) was a Median noble and admiral who served the Persian Empire during the reign of Darius the Great (522–486 BC). He is known for his role in leading the Persian amphibious expedition against Greece in 490 BC during the Greco-Persian Wars. Along with Darius's nephew Artaphernes, he was tasked with subduing Eretria and Athens, succeeding the previously defeated Mardonius.

While some later sources claim Datis died during the Battle of Marathon (490), this is not corroborated by other evidence. His later career is largely unknown except that his sons served as cavalry leaders under Xerxes I (486–465 BC). Datis was familiar with Greek affairs, maintained connections with Greek officials, respected Greek deities, and even attempted to speak Greek.

During the second Persian invasion of Greece, which took place from 480 to 479 BCE, Athens was captured and subsequently destroyed by the Achaemenid Empire. A prominent Greek city-state, it was attacked by the Persians in a two-phase offensive, amidst which the Persian king Xerxes the Great had issued an order calling for it to be torched. The Persian army commander Mardonius oversaw the razing of several structures of political and religious significance throughout the city, including the Acropolis, the Old Temple of Athena, and the Older Parthenon. Two years later, the Greek coalition retook Athens and dealt a devastating defeat to the Persian army during the Battle of Plataea, killing Mardonius and setting the stage for the eventual expulsion of all Persian troops from southern Greece.

Athens' destruction by the Persians prompted the Greeks to build the Themistoclean Wall around the city in an effort to deter future invaders, and the event continued to have an impact on Greek society for a prolonged period; a number of Athenian artifacts that had been taken to Persia during the Greco-Persian Wars were returned to Greece during the Wars of Alexander the Great, and according to the Greek historians Plutarch and Diodorus, it was the legacy of the Persian assault on Athens that ultimately influenced Alexander's decision to burn down the Palace of Persepolis near the end of his conquest of Persia in 330 BC.

Xerxes I (/ˈzɜːrksiːz/ ZURK-seez; c. 518 – August 465 BC), commonly known as Xerxes the Great, was a Persian ruler who served as the fourth King of Kings of the Achaemenid Empire, reigning from 486 BC until his assassination in 465 BC. He was the son of Darius the Great and Atossa, a daughter of Cyrus the Great.

In Western history, Xerxes is best known for his invasion of Greece in 480 BC, which ended in Persian defeat. Xerxes was made successor by Darius over his elder brother Artobazan and inherited a large, multi-ethnic empire upon his father's death. He consolidated power by crushing revolts in Egypt and Babylon, and renewed his father's campaign to subjugate Greece and punish Athens and its allies for their interference in the Ionian Revolt. In 480 BC, Xerxes led a large army and crossed the Hellespont into Europe. He achieved victories at Thermopylae and Artemisium before capturing and razing Athens. His forces gained control of mainland Greece north of the Isthmus of Corinth until their defeat at the Battle of Salamis. Fearing that the Greeks might trap him in Europe, Xerxes retreated with the greater part of his army back to Asia, leaving behind Mardonius to continue his campaign. Mardonius was defeated at Plataea the following year, ending the Persian invasion.