The Battle of Plataea, fought in 479 BC, stands as a historical turning point in the Greco-Persian Wars, securing the freedom of Greece and halting the Persian invasion. This clash between the Greek city-states, united under the Hellenic League, and the Persian Empire showcased the resilience of Greek hoplites and the brilliance of Greek military tactics. Led by Pausanias of Sparta, the Greek Alliance delivered a Greek victory that reshaped Classical Greece. This article explores the battle’s timing, location, progression, casualties, outcome, and enduring legacy, immersing readers in the drama of ancient warfare.
When Did the Battle of Plataea Take Place? Where?
The Battle of Plataea occurred in August 479 BC on the Plataean plain in Boeotia, near the city of Plataea, located in central Greece. Situated close to the Asopus River and overlooked by Mount Cithaeron, the battlefield was a strategic focal point during the Second Persian War, a phase of the Greco-Persian Wars. The battle followed the Greek victory at the Battle of Salamis (480 BC) and the heroic stand at the Battle of Thermopylae, marking the culmination of Xerxes I’s campaign to conquer Greece.
The Persian Army, under Mardonius, sought to subdue the Greek city-states, including Sparta, Athens, Corinth, and Thebes (an ally of Persia). The Hellenic League, formed to resist the Persian invasion, united these city-states in a desperate stand for Greek independence. Boeotia’s open terrain favored the Persian cavalry, but the Greek Alliance leveraged Mount Cithaeron and the Asopus River for strategic defense, setting the stage for a climactic confrontation.

Map of the Battle of Plataea
The Plataean plain, a broad expanse in Boeotia, was framed by the Asopus River to the north and Mount Cithaeron to the south, creating a natural corridor for the battle. The Greek Alliance, numbering around 40,000 Greek hoplites, positioned themselves on the slopes of Mount Cithaeron, using the high ground to counter the Persian cavalry’s mobility. The Persian Army, with approximately 70,000–100,000 troops under Mardonius, camped north of the Asopus River, relying on their cavalry and archers to dominate the open plain.
Key locations included:
- Greek positions: Pausanias placed Spartan and Athenian contingents on the right and left wings, respectively, with Aristides commanding the Athenians. Smaller city-states like Corinth filled the center.
- Persian positions: Mardonius deployed his forces along the Asopus River, with Persian cavalry patrolling the plain and infantry, including Greek allies from Thebes, forming the main line.
- Terrain features: The Plataean plain offered open ground for cavalry, while Mount Cithaeron provided defensive cover for the Greeks. Springs and streams near the plain complicated military logistics.
This layout shaped the Greek military tactics, emphasizing the hoplite formation and strategic withdrawal to exploit the terrain, setting the stage for a Greek victory.

Main Developments of the Battle of Plataea
The Battle of Plataea unfolded as a gripping saga of Greek unity and military strategy, with Pausanias orchestrating a desperate stand against Mardonius’s Persian Army. The battle’s progression, marked by cunning battle tactics and fierce infantry warfare, can be divided into four key phases, each a testament to the Greek resistance in the Second Persian War.
Initial Standoff (Days 1–10)
For ten days, the Greek Alliance and Persian Army faced off across the Asopus River. Pausanias, wary of the Persian cavalry’s superiority, kept his Greek hoplites on the slopes of Mount Cithaeron, frustrating Mardonius’s attempts to draw them onto the open Plataean plain. The Persians harassed the Greeks with cavalry raids and archers, while Greek military tactics focused on maintaining discipline within the hoplite formation. Aristides, leading the Athenians, repelled attacks from Theban allies, showcasing the Athenian contribution to the Hellenic League.
The Persians disrupted Greek water supplies by fouling springs near the plain, forcing Pausanias to consider a strategic withdrawal. Mardonius, confident in his Persian military strategy, believed the Greeks were retreating in disarray, setting the stage for his fatal miscalculation.

Greek Maneuver and Persian Assault (Day 11)
On the night before the battle, Pausanias ordered a tactical repositioning, moving the Greek Alliance to a new position closer to Plataea. Miscommunication led to a fragmented withdrawal, with Spartans and Athenians separated from the center. Mardonius, interpreting this as a retreat, launched a full-scale assault on August 27, 479 BC. The Persian cavalry charged, supported by infantry and Theban allies, aiming to crush the seemingly disorganized Greeks.

The Greek hoplites, however, held firm. The Spartan wing, under Pausanias, formed a tight hoplite formation, absorbing Persian attacks. Aristides’s Athenians countered Theban infantry, leveraging their experience from the Battle of Salamis. The chaotic Greek repositioning inadvertently lured the Persians into overextending, a critical error in their Persian conquest strategy.
Climactic Battle (Day 12)
The decisive phase unfolded as Pausanias rallied the Spartans for a counterattack. The Greek phalanx, a disciplined wall of shields and spears, advanced against Mardonius’s infantry. In a brutal melee, the Spartans overwhelmed the Persian center, with Pausanias personally leading the charge. Mardonius was killed, likely by a Spartan spear, shattering Persian morale. Simultaneously, Aristides’s Athenians routed the Thebans, securing the left flank.
The Persian Army collapsed, with surviving troops fleeing across the Asopus River. The Greek Alliance pursued, capturing the Persian camp and its supplies. The Spartan leadership and Athenian contribution proved decisive, turning the tide in ancient Greek warfare and ensuring a Greek victory.
Aftermath and Pursuit
The Greeks consolidated their victory by destroying the remnants of the Persian Army. The Hellenic League’s unity, forged through military alliances, prevented a Persian regrouping. The Persian retreat from Boeotia marked the end of Xerxes I’s ambition to dominate Greece, securing the freedom of Greece and cementing Plataea’s place in Classical Greek history.
Casualties of the Battle of Plataea
The Battle of Plataea was costly, reflecting the ferocity of infantry warfare:
- Greek Alliance: Estimates suggest the Greek hoplites suffered around 1,000–1,500 casualties, primarily Spartans and Athenians. The relatively low losses underscored the effectiveness of the Greek phalanx and Spartan leadership.
- Persian Army: The Persian defeat was catastrophic, with 20,000–50,000 troops killed, including Mardonius, and many captured. The loss of the Persian camp and supplies crippled their campaign.
These figures, though debated by ancient sources like Herodotus, highlight the Greek victory’s scale and the Persian Empire’s devastation, reinforcing Plataea’s status as a historical turning point.
Who Won the Battle of Plataea?
The Battle of Plataea resulted in a decisive Greek victory, with the Hellenic League, led by Pausanias of Sparta and supported by Aristides of Athens, defeating the Persian Army under Mardonius. The triumph ended the Second Persian War, driving the Persian retreat from Europe and securing Greek independence. The Greek city-states, including Sparta, Athens, and Corinth, demonstrated unparalleled Greek unity, overcoming the Persian conquest’s threat.
The victory built on the momentum of the Battle of Salamis and Battle of Thermopylae, ensuring the freedom of Greece. It weakened Xerxes I’s empire and bolstered the Greek Alliance’s resolve, shaping post-war Greece and the trajectory of Classical Greece.

Conclusion
The Battle of Plataea in 479 BC was a climactic triumph of Greek military tactics and Greek unity, forever altering the course of the Greco-Persian Wars. Pausanias’s Spartan leadership, Aristides’s Athenian contribution, and the Greek phalanx’s resilience crushed Mardonius’s Persian Army, securing the Plataean plain as a symbol of Greek independence movement. This Greek victory marked a historical turning point, ensuring the Persian retreat and shaping Classical Greek history. The legacy of Plataea endures in ancient warfare, a testament to the power of military alliances and strategic defense in the face of overwhelming odds.