Miltiades: The military genius behind Athens' remarkable victory at Marathon

Miltiades was born around 550 BC into the Philaid family, a powerful noble family line that, according to tradition, claimed descent from Aeacus and produced Olympic victors such as his father, Cimon Coalemos.

He grew up during a period when noble families still held significant influence over military and political appointments, and he benefited from the wealth and status that came with his distinguished ancestry. 

Eventually, a distant inheritance changed his future. Around 516 BC, Miltiades travelled to the Thracian Chersonese to take control of the region following the death of his uncle, Miltiades the Elder, who had ruled it as a local tyrant and founder of the Athenian colony there.

Once there, he brought order with a personal guard and established himself as a strongman over both Greek settlers and Thracian tribes.

In doing so, he reinforced Athenian interests on the northern frontier. His time in the Chersonese exposed him to the growing power of Persia and placed him in the path of Darius I’s plans.

During Darius’ Scythian campaign in 513 BC, Miltiades joined the Persian expedition and helped build a pontoon bridge across the Danube.

But, he later attempted to sabotage the Persian retreat, which showed his growing anger toward the empire.

After the Ionian Revolt had failed and Persian forces had taken back control, he fled the Chersonese and returned to Athens in 493 BC, and he brought both tactical insights and political trouble with him.

Upon his return, Miltiades faced accusations of tyranny and Persian sympathies.

However, he managed to defend his conduct by claiming he had resisted Persian expansion and had acted in the interests of Greek freedom.

At a time when the memory of the Ionian Revolt still fed public fear, his experience was too valuable to ignore.

Soon after, the threat to Athens grew worse. As punishment for Athenian support for the Ionian rebels, Darius I launched an expedition against the Greek mainland and placed his forces under the command of Datis and Artaphernes.

After they had attacked Naxos and destroyed Eretria, they landed at Marathon, a flat coastal plain roughly 40 kilometres from Athens, ideal for cavalry operations.

Ancient sources, such as Herodotus, placed the Persian army at around 20,000 to 25,000 troops, though modern estimates vary and some suggest higher figures.

At this point, Athens sent for help from Sparta, yet religious commitments apparently delayed the Spartan response.

They were observing the Carneia, a sacred festival during which military activity was prohibited.

In the meantime, the Athenian assembly appointed ten strategoi to direct the city’s defence, including Miltiades.

He quickly became the most confident voice and argued that delay could allow the Persians to dig in or march directly on the city.

Crucially, he persuaded the polemarch Callimachus, whose vote carried equal weight with the strategoi, to cast the deciding vote in favour of battle.

This decision gave him the authority to lead the offensive.

Before dawn on the day of battle, Miltiades organised the Athenian and Plataean hoplites, roughly 10,000 in total, into an unusual formation.

Instead of maintaining a uniform depth across the line, he thinned the centre and strengthened the wings.

His aim was to bait the Persians into advancing against the weaker middle, while the wings would hold firm and then close in on the enemy’s flanks.

Given that the Persians lacked heavy infantry and relied on archers and cavalry, Miltiades chose to close the distance quickly.

Accordingly, the Greek phalanx charged across the plain at a run, a rare tactic in hoplite warfare, which relied more often on slow, shielded advances.

The speed of the charge reduced losses from archery and shocked the Persian ranks.

As Miltiades had anticipated, the centre faltered under the Persian assault, but the wings held their ground and pivoted inward to surround the invaders.

Soon, confusion spread through the Persian line. Trapped and overwhelmed, many tried to flee back to their ships, and over 6,000 were killed.

The Greeks suffered fewer than 200 casualties, a remarkable result given the scale of the battle.

Miltiades’ disciplined formation and sense of timing helped a smaller force to rout a numerically superior army.

His knowledge of Persian battlefield habits and the limitations of their infantry helped give the Athenians a clear advantage.

According to Herodotus, Callimachus was killed during the pursuit.

After the victory, Miltiades stood at the height of his influence in Athens. The Athenian assembly granted him command of a fleet for a new campaign, during which he claimed he would punish the islands that had supported Persia.

In reality, he directed the fleet to Paros because he wanted revenge against a city that he believed had betrayed him years earlier.

He had requested ships on the grounds that he possessed knowledge which, if acted upon, could bring great benefit to Athens.

When his siege failed and he sustained a serious leg wound, his enemies in Athens used the chance to strike back.

On his return, Miltiades faced trial for deceiving the people and for the way he used public money.

Xanthippus was the father of the future statesman Pericles, and he led the charge against him.

Though he avoided execution, the court imposed a heavy fine of fifty talents. As he lay injured, unable to pay or campaign again, infection took hold, and he died soon after in 489 BC, still confined under the terms of his sentence. 

His downfall demonstrated how quickly political fortunes could change in democratic Athens.

Public gratitude gave way to suspicion, and wartime glory did not exempt him from public criticism.

Nevertheless, his military achievements endured, and his son Cimon would eventually restore the family's influence in later decades.