Analyse the causes, key events and consequences of the Greco-Persian Wars (499 to 479 BCE), and evaluate the reliability of Herodotus and other evidence.

What this dot point is asking

You must explain why the wars happened, narrate the decisive campaigns, assess their consequences, and evaluate how far we can trust the ancient evidence, above all Herodotus.

Causes: empire meets the city-states

By the late sixth century BCE the Persian Empire under Cyrus and then Darius I controlled an enormous territory from the Aegean to the Indus, including the Greek cities of Ionia on the Anatolian coast. In 499 BCE these Ionian cities rebelled (the Ionian Revolt), supported by a small force from Athens and Eretria. Persia crushed the revolt by 494 BCE and sacked Miletus, but the Athenian involvement gave Darius a pretext, and a motive of revenge, to punish mainland Greece.

The first invasion: Marathon, 490 BCE

Darius sent a seaborne expedition that destroyed Eretria and landed at Marathon in Attica. There the Athenians, with their Plataean allies and led by generals including Miltiades, defeated the larger Persian force. Herodotus reports Athenian dead at 192 against thousands of Persians, figures that signalled, accurately or not, an astonishing victory. The legend of the runner carrying news to Athens later gave us the marathon.

The second invasion: Xerxes, 480 to 479 BCE

Darius' son Xerxes launched a far larger combined land and sea invasion in 480 BCE, bridging the Hellespont and cutting a canal through the Athos peninsula. A Greek alliance led by Sparta and Athens resisted. At the pass of Thermopylae, a small force under the Spartan king Leonidas held the Persians for several days before being outflanked and destroyed, while the fleet fought at Artemisium. The delay was strategically modest but became a symbol of free men resisting tyranny.

Persia then occupied and burned Athens, whose citizens had evacuated on Themistocles' advice. The decisive blow came at sea at Salamis (480 BCE). The next year the Greek land army, led by the Spartan Pausanias, won at Plataea (479 BCE), and tradition placed a naval victory at Mycale on the same period, ending the threat to the mainland.

Consequences

The Greek victory preserved the independence of the city-states and had lasting cultural effects: it fed a sense of Greek identity against the "barbarian," celebrated in Aeschylus' tragedy "The Persians" (472 BCE), our earliest surviving play and a near-contemporary source written by a Salamis veteran. Strategically, Athens used its navy and the new Delian League (formed 478 BCE) to continue the war and then to build an empire, setting up the rivalry with Sparta that erupted in the Peloponnesian War.

Evaluating Herodotus

Herodotus of Halicarnassus, writing perhaps a generation later (around the 440s to 420s BCE), is our principal narrative source and earned the title "Father of History" from Cicero. He travelled widely, named his informants and often gave competing versions, which is methodologically impressive for his time. But his work has clear problems. His Persian troop numbers, such as the famous claim of over a million men, are wildly inflated and impossible to supply. He includes oracles, dreams and divine retribution as causes, reflecting his worldview rather than military analysis. And his sources were largely Greek, giving a Hellenocentric slant that casts the wars as freedom against despotism.

A good evaluation balances these flaws against his strengths: he preserves invaluable detail, distinguishes what he saw from what he was told, and remains our indispensable starting point, corroborated where possible by Aeschylus, inscriptions like the Themistocles Decree and the Serpent Column dedicated at Delphi.

Why this matters for your study

The Greco-Persian Wars are a classic SACE military-conflict study because the narrative and the source critique are inseparable. Strong responses use accurate dates and battles while continuously asking how Herodotus knew what he claims, and whose perspective the tradition preserves.