15 Largest Ancient Greek Battles Ranked by Army Size

Ancient Greek warfare is often reduced to a neat image: two compact phalanxes, a cloud of dust and a decisive shove with shields. The largest battles were far less tidy. They brought together hoplites, Macedonian pikemen, cavalry, archers, slingers, mercenaries and fleets drawn from several states or kingdoms. Some unfolded across open plains; others were decided in cramped passes or narrow straits.

Ranking them by size is difficult. Ancient authors routinely gave suspiciously generous figures to enemy armies, particularly Persian ones. Modern estimates are usually lower, sometimes dramatically so. This list therefore uses broad, defensible ranges and ranks battles by the probable number of combatants or ships directly engaged, not by whatever impressive total an ancient chronicler wished to place on the page.

The list covers battles in which Greek city-states, Macedonian kingdoms or Hellenistic forces played a central role. Naval battles are identified separately because a trireme cannot sensibly be counted as though it were one unusually buoyant infantryman.

At a glance: the largest battles

Rank	Battle	Date	Estimated forces involved	Result
15	Salamis	480 BCE	Around 900 to 1,100 warships claimed, probably fewer in action	Greek naval victory
14	Delium	424 BCE	Perhaps 14,000 to 18,000	Boeotian victory
13	Mantinea	418 BCE	Perhaps 17,000 to 20,000	Spartan victory
12	Tanagra	457 BCE	Perhaps 25,000 to 30,000	Spartan-led victory
11	Marathon	490 BCE	Perhaps 30,000 to 40,000	Athenian and Plataean victory
10	Granicus	334 BCE	Perhaps 55,000 to 65,000	Macedonian victory
9	Pydna	168 BCE	Roughly 65,000 to 70,000	Roman victory
8	Cynoscephalae	197 BCE	Roughly 50,000 to 55,000	Roman victory
7	Crocus Field	353 or 352 BCE	Perhaps 45,000 to 50,000	Macedonian victory
6	Chaeronea	338 BCE	Roughly 60,000 to 65,000	Macedonian victory
5	Himera	480 BCE	Perhaps 70,000 to 100,000	Syracusan and Akragantine victory
4	Mycale	479 BCE	Perhaps 70,000 to 110,000	Greek victory
3	Issus	333 BCE	Roughly 90,000 to 140,000	Macedonian victory
2	Plataea	479 BCE	Roughly 110,000 to 150,000	Greek victory
1	Gaugamela	331 BCE	Roughly 95,000 to 150,000	Macedonian victory

These figures are not precise headcounts. They are working estimates assembled from ancient narratives and modern reconstructions. The order becomes especially uncertain once we leave the exceptionally large royal armies and enter the world of citizen levies.

15. Battle of Salamis, 480 BCE

The Battle of Salamis cannot be ranked cleanly beside land battles, but no list of the largest Greek engagements should omit it. Herodotus gives the Greek coalition 378 triremes. Persian fleet totals vary from roughly 600 operational ships to far higher ancient claims.

Themistocles persuaded the Greeks to fight in the narrow waters between Salamis and the mainland. There the larger Persian fleet could not exploit its numbers. Greek crews rammed, disabled and boarded enemy vessels while confusion spread through the crowded Persian line.

Commanders: Themistocles and the Spartan admiral Eurybiades; Xerxes and his naval commanders
Principal weapons: Bronze rams, spears, bows and the weapons of embarked marines
Why it mattered: The defeat forced Xerxes to withdraw much of his army and ensured that the invasion would not be supplied freely by sea.

The tragedian Aeschylus probably fought at Salamis. In The Persians, first performed only eight years later, he gives the Greek battle cry as: “Forward, sons of the Greeks, free your country.” It is literature, not stenography, but it is the closest thing here to a participant’s voice.

14. Battle of Delium, 424 BCE

The Battle of Delium was a major Athenian defeat in Boeotia. Athens fielded about 7,000 hoplites as well as light troops and cavalry. The Boeotians had a similar number of hoplites, supported by cavalry, peltasts and other light infantry.

Pagondas massed the Theban wing to an unusual depth of 25 shields. When the Boeotian left began to fail, he sent cavalry behind a ridge to reinforce it. Their sudden appearance helped panic the Athenians, who believed a fresh army had arrived.

Commanders: Hippocrates of Athens and Pagondas of Thebes
Principal weapons: Hoplite spear and shield, cavalry spear, javelin and sword
Why it mattered: The battle displayed Theban tactical flexibility decades before the victories of Epaminondas.

Socrates served in the Athenian army and survived the retreat. Alcibiades later claimed to have protected him, a story with the useful dramatic polish of a man describing his own heroism.

13. Battle of Mantinea, 418 BCE

The Battle of Mantinea was the largest set-piece land battle of the Peloponnesian War. Sparta and its allies faced Argos, Mantinea, Athens and other coalition forces. Modern estimates commonly place around 8,000 to 10,000 men on each side.

Both lines drifted to their right, the usual consequence of hoplites edging towards the protection of the next man’s shield. King Agis attempted a complicated correction during the advance. Parts of it failed, but Spartan discipline recovered the position and broke the allied centre.

Commanders: Agis II; a coalition command including Argive and Mantinean leaders, with Laches and Nicostratus leading the Athenians
Principal weapons: Dory, aspis, xiphos, javelins and cavalry weapons
Why it mattered: Sparta restored its military reputation after the humiliation at Sphacteria.

Thucydides called it “the greatest battle that had taken place for a very long time among the Greeks”. As a near-contemporary who had little patience for decorative exaggeration, he is worth hearing.

12. Battle of Tanagra, 457 BCE

The Battle of Tanagra brought Athens and its allies against a Spartan-led Peloponnesian army in Boeotia. Thucydides reports 11,500 Peloponnesian hoplites, while the Athenian alliance may have fielded roughly 14,000 men, including Argives and Thessalian cavalry.

The Spartans won a costly victory but did not destroy the Athenian army. Just weeks later, Athens defeated the Boeotians at Oenophyta and extended its control across much of central Greece.

Commanders: Nicomedes for Sparta; Athenian command is uncertain
Principal weapons: Hoplite spear, aspis and sword, supported by cavalry
Why it mattered: Tanagra showed both the reach of Athenian land power and its limits. The result was decisive on the field, rather less decisive on the map.

11. Battle of Marathon, 490 BCE

The Battle of Marathon was smaller than Plataea but politically immense. Athens and Plataea probably put around 10,000 to 11,000 hoplites into the field. Estimates for the Persian landing force vary widely, with roughly 20,000 to 30,000 providing a cautious modern range.

The Athenians strengthened their wings, accepted a thinner centre and advanced rapidly across the plain. The Persian centre pushed forward, but the Greek wings prevailed and turned inward. The army then hurried back towards Athens to prevent a landing elsewhere.

Commanders: Miltiades and the Athenian board of generals; Datis and Artaphernes
Principal weapons: Dory, aspis, xiphos, Persian bows, spears and light shields
Why it mattered: The victory preserved Athenian independence and became a central part of the city’s democratic identity.

Herodotus says the Athenians were “the first Greeks we know of to charge their enemy at a run”. The statement may simplify what happened, but it preserves the impression made by an unusually aggressive advance.

10. Battle of the Granicus, 334 BCE

At the Granicus, Alexander won his first major battle in Asia. His army comprised roughly 32,000 infantry and 5,000 cavalry. The Persian satraps may have assembled about 10,000 to 20,000 cavalry and a similar number of Greek mercenary infantry, though the figures remain uncertain.

The Macedonians crossed the river under attack. Alexander led the Companion cavalry into a hard fight on the bank while his infantry secured the crossing. Once the Persian cavalry broke, the Greek mercenaries behind them were surrounded and cut down or enslaved.

Commanders: Alexander III; a coalition of Persian satraps including Spithridates and Arsites
Principal weapons: Xyston, sarissa, kopis, spears and javelins
Why it mattered: Victory opened western Asia Minor and gave Alexander’s invasion immediate credibility.

9. Battle of Pydna, 168 BCE

The Battle of Pydna ended the Third Macedonian War. Lucius Aemilius Paullus commanded roughly 30,000 to 35,000 Roman and allied troops. Perseus of Macedon may have had around 40,000 to 44,000.

The Macedonian phalanx initially drove the Romans back. As it advanced over uneven ground, however, gaps opened between its units. Roman legionaries entered those gaps and fought at close range, where the sarissa was cumbersome and the large Roman shield offered a severe advantage.

Commanders: Lucius Aemilius Paullus and Perseus
Principal weapons: Sarissa, pelta, pilum, gladius and scutum
Why it mattered: The Antigonid monarchy was abolished and Macedon was divided into republics under Roman supervision.

Pydna is sometimes dated to 148 BCE because another Macedonian defeat occurred then during the revolt of Andriscus. The famous phalanx-versus-legion battle belongs firmly to 168 BCE.

8. Battle of Cynoscephalae, 197 BCE

The Battle of Cynoscephalae pitted Philip V’s Macedonian phalanx against the Roman army of Titus Quinctius Flamininus. Each side probably fielded around 25,000 to 27,000 men.

The fighting developed unexpectedly in broken, misty terrain. Philip’s right wing formed and drove forward successfully, while his left was still deploying. Roman units exploited the gap. A tribune detached maniples to strike the engaged Macedonian phalanx from behind, where its long sarissas and dense formation offered little protection.

Commanders: Philip V and Titus Quinctius Flamininus
Principal weapons: Sarissa, machaira or kopis, Roman pilum, gladius and scutum
Why it mattered: Macedonian power in Greece was decisively reduced, while Rome became the chief arbiter of Greek affairs.

This was not proof that a legion automatically defeated a phalanx. Terrain, incomplete deployment and command decisions mattered. Weapons do not fight historical comparison charts; people fight battles.

7. Battle of Crocus Field, 353 or 352 BCE

The Battle of Crocus Field was Philip II’s decisive intervention in the Third Sacred War. He faced the Phocian commander Onomarchus in Thessaly, reportedly with more than 20,000 infantry and 3,000 cavalry. The Phocians may have had around 20,000 infantry and 500 cavalry.

Philip’s advantage in cavalry was critical on the open ground. Onomarchus was killed and thousands of Phocian prisoners were executed or drowned as temple robbers, at least according to the hostile tradition.

Commanders: Philip II and Onomarchus
Principal weapons: Sarissas, hoplite spears, cavalry lances, swords and missile weapons
Why it mattered: Philip gained control of Thessaly and presented himself as the defender of Apollo’s sanctuary at Delphi.

The battle enlarged Macedonian influence under the respectable cloak of religious punishment. Philip was very good at finding a moral principle which happened to march in the same direction as his army.

6. Battle of Chaeronea, 338 BCE

At Chaeronea, Philip II of Macedon defeated a coalition led by Athens and Thebes. The Macedonians probably fielded about 30,000 infantry and 2,000 cavalry. The allied army was of comparable size, though its exact composition remains disputed.

Philip commanded the right while the young Alexander operated on the left. Ancient accounts are too brief to justify the beautifully precise manoeuvre diagrams often presented today. Philip’s experienced army nevertheless broke the coalition line, and the Theban Sacred Band was annihilated near the battlefield monument later called the Lion of Chaeronea.

Commanders: Philip II and Alexander; Chares, Lysicles and Theagenes among the allies
Principal weapons: Macedonian sarissa, hoplite spear, cavalry lance and sword
Why it mattered: The victory made Philip the dominant power in Greece and enabled the formation of the League of Corinth.

Chaeronea did not end Greek political life, but it ended any serious hope that the old city-state alliances could contain Macedon by force.

5. Battle of Himera, 480 BCE

The Battle of Himera was the great western Greek battle of 480 BCE. Gelon of Syracuse and Theron of Akragas faced a Carthaginian expedition led by Hamilcar on the north coast of Sicily.

The figure of 300,000 Carthaginian troops given by Herodotus is implausible. A force of around 30,000 to 50,000 is often suggested, opposed by perhaps 25,000 to 30,000 Greeks. Even reduced, those numbers make Himera one of the largest battles fought in the Greek west.

Later accounts describe Greek cavalry infiltrating or surprising the Carthaginian camp. Hamilcar died during the battle, although the sources disagree on precisely how, and his army was destroyed or scattered.

Commanders: Gelon and Theron; Hamilcar the Magonid
Principal weapons: Hoplite equipment, cavalry spears, javelins, bows and chariots
Why it mattered: The victory protected the major Greek cities of Sicily from Carthaginian domination for decades.

The traditional claim that Himera and Salamis occurred on the same day is attractive, patriotic and impossible to prove. Ancient historians enjoyed a meaningful coincidence as much as anyone.

4. Battle of Mycale, 479 BCE

Mycale was fought on the coast of Asia Minor, probably on the same day as Plataea according to Greek tradition. A Greek fleet under Leotychidas and Xanthippus found the Persian ships beached and protected by a fortified camp. The Greeks landed, defeated the defending army and burned the fleet.

Herodotus reports 110 Greek ships and a Persian fleet originally numbering 300, though many Phoenician vessels had been sent away. The land forces are harder to reconstruct. The combined presence of sailors, marines and troops may have placed tens of thousands of men around the battlefield.

Commanders: Leotychidas of Sparta and Xanthippus of Athens; Tigranes for Persia
Principal weapons: Hoplite spears and shields, bows, javelins and naval equipment
Why it mattered: Mycale encouraged revolt among the Ionian Greeks and carried the war back across the Aegean.

Its fame suffers because Plataea occupies so much historical furniture, but Mycale completed the destruction of Xerxes’ offensive power in the Aegean.

3. Battle of Issus, 333 BCE

The Battle of Issus placed Alexander and Darius face to face for the first time. The narrow coastal plain limited Persia’s numerical advantage, with mountains on one side and the sea on the other. Alexander probably commanded about 40,000 troops. Darius may have fielded somewhere between 50,000 and 100,000, far below the extravagant totals preserved by ancient writers.

Alexander led his right wing across the River Pinarus and struck the Persian left. In the centre, Greek mercenaries in Persian service fought hard against the Macedonian phalanx. The battle turned when Alexander wheeled towards the Persian centre and threatened Darius directly. Darius escaped, but his camp and family were captured.

Commanders: Alexander III and Darius III
Principal weapons: Sarissas, cavalry lances, hoplite spears, composite bows and javelins
Why it mattered: Issus secured Alexander’s rear and opened the eastern Mediterranean coast to his advance.

The geography did much of Alexander’s work before the first spear was lowered. Darius had a large army and remarkably little room in which to use it, an arrangement military commanders have been regretting ever since.

2. Battle of Plataea, 479 BCE

At Plataea, the Greek coalition confronted the army left in Greece by Xerxes under Mardonius. Herodotus gives enormous figures, including 110,000 Greeks and 300,000 Persians and allies. Few modern historians accept the Persian total. Estimates nearer 70,000 to 120,000 troops across both sides are commonly judged more credible.

The battle was not a perfectly controlled hoplite advance. Greek units became separated during a difficult night withdrawal, while Persian cavalry had already disrupted their supplies. Mardonius attacked when the coalition appeared vulnerable. The Spartans and Tegeans held, then broke the Persian infantry after Mardonius was killed. The fortified Persian camp was subsequently stormed.

Commanders: Pausanias for the Greek coalition; Mardonius for Persia
Principal weapons: Dory spear, aspis, xiphos, Persian bows, spears and cavalry weapons
Why it mattered: Plataea ended the immediate Persian land threat to mainland Greece.

Herodotus gives the Spartan commander a suitably grave appeal before the fighting: “Grant us to repel the man who would enslave Hellas.” Ancient speeches should always be handled carefully, but the line reflects how the victors later understood the battle.

1. Battle of Gaugamela, 331 BCE

The Battle of Gaugamela was the largest and most decisive battle of Alexander the Great’s campaign against the Achaemenid Empire. Darius III chose open ground near modern Mosul and had it cleared to accommodate his cavalry and scythed chariots. Alexander arrived with roughly 40,000 infantry and 7,000 cavalry.

Persian numbers are fiercely disputed. Ancient totals rise into the hundreds of thousands and, in some accounts, wander beyond credibility altogether. A modern working range of about 50,000 to 100,000 Persian troops is more plausible, although certainty is impossible.

Alexander advanced obliquely to the right, pulling part of the Persian line away from the prepared ground. When a gap appeared, he drove the Companion cavalry and supporting infantry towards Darius. The Persian king fled, and organised resistance across the centre collapsed.

Commanders: Alexander III of Macedon and Darius III
Principal weapons: Sarissa, xyston cavalry lance, kopis, bows, javelins and scythed chariots
Why it mattered: The defeat destroyed Darius’s ability to defend the imperial heartlands. Babylon, Susa and Persepolis lay open.

Arrian, writing centuries later from earlier campaign histories, has Alexander tell his men that they were fighting for “the sovereignty of the whole of Asia”. It is polished literary history rather than a battlefield transcript, but it catches the scale of the prize rather well.

Why ancient army figures are so uncertain

Ancient numbers survive through authors who wrote for moral, political and literary purposes. They did not have modern staff returns, and even commanders may not have known precisely how many troops remained fit and present on a given morning.

Several problems recur:

Patriotic exaggeration: A larger defeated enemy made a Greek victory appear more glorious.
Different categories: Some totals include sailors, camp followers or allied contingents; others count only heavy infantry.
Copying errors: Greek numerals were vulnerable to corruption as manuscripts were copied.
Logistical limits: Water, fodder, roads and camp space place practical limits on how many people could occupy a battlefield.
Modern disagreement: Historians use the same incomplete evidence but make different assumptions about frontage, supply and unit strength.

The sensible approach is to use ranges and to distinguish reported figures from probable ones. A precise total such as 102,300 may look authoritative, but in this field it usually means someone has become rather too friendly with a calculator.

Which battle was truly the largest?

Gaugamela is the strongest candidate if Macedonian-led warfare across the wider Greek world is included. It combined Alexander’s largest field army with a substantial Persian host and was fought on ground deliberately prepared for mass manoeuvre.

Plataea may have been the largest battle fought in mainland Greece during the Classical period. Its precise numbers remain debatable, but the unusually broad coalition on both sides points to a vast concentration of troops by contemporary standards.

Salamis was probably the largest naval encounter involving the Greek states. Counting ships, crews and marines might place more human beings in the battle zone than at many land engagements, although the evidence does not allow a dependable grand total.

The legacy of Greece’s largest battles

These battles trace a long transformation. Marathon, Salamis and Plataea belonged to the age of the citizen hoplite and the independent polis. Mantinea and Delium exposed the strengths and limitations of that system. Chaeronea announced the dominance of Macedon, while Gaugamela carried Macedonian arms far beyond the Aegean. Cynoscephalae and Pydna then showed Greek and Macedonian armies confronting a new imperial power from the west.

There was no single, timeless “Greek way of war”. Tactics changed, armies became more specialised and political loyalties shifted constantly. The spear remained important, but so did cavalry, missile troops, engineering, naval power and, repeatedly, the ability to keep an army fed. Heroism earns the inscriptions. Logistics usually decides whether there is anyone present to carve them.