Sixth Grade Social Studies: Greco-Persian Wars and the Peloponnesian War
The classical era of ancient Greece was defined by two cataclysmic military conflicts: the struggle for independence against the Persian Empire, followed by a ruinous civil war between Athens and Sparta.
The Greco-Persian Wars (499–449 BCE)
At the dawn of the fifth century BCE, the expanding Achaemenid Persian Empire held dominion from the Indus River to the Aegean Sea. When Persian King Darius I conquered the Greek city-states of Ionia on the coast of Asia Minor, the stage was set for conflict.
The Ionian Revolt (499 BCE)
In 499 BCE, the Ionian Greek city-states rebelled against Persian tyranny. The Ionians appealed to mainland Greece for help; Sparta refused, but democratic Athens sent twenty war galleys. The allied Greek forces marched inland and burned the Persian regional capital of Sardis before being defeated. King Darius I was enraged by the audacity of a small city across the sea; he tasked a royal servant with repeating to him three times at every banquet: "Master, remember the Athenians!"
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| TIMELINE OF THE GRECO-PERSIAN WARS |
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| 490 BCE: BATTLE OF MARATHON |
| King Darius I launches first invasion; Athenian hoplites defeat Persian |
| army on the beach of Attica; Pheidippides runs to Athens. |
| |
| 480 BCE: BATTLE OF THERMOPYLAE & BATTLE OF SALAMIS |
| King Xerxes I launches massive invasion; King Leonidas and 300 Spartans |
| hold the mountain pass; Themistocles traps Persian fleet at Salamis. |
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| 479 BCE: BATTLE OF PLATAEA |
| Allied Greek hoplites defeat remaining Persian land army under Mardonius;|
| Persian invasion driven permanently from Greece. |
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The Battle of Marathon (490 BCE)
In 490 BCE, Darius dispatched a fleet of 600 ships carrying 25,000 Persian infantry and cavalry across the Aegean, landing in the bay of Marathon, only 26 miles northeast of Athens. Outnumbered more than two to one, Athenian general Miltiades organized 10,000 Athenian hoplites and 1,000 allies from Plataea.
Miltiades weakened his center and reinforced his wings. When the Persian archers and cavalry charged, the Athenian wings crushed the Persian flanks and encircled the center. The Persians broke in panic, fleeing to their ships with over 6,400 dead, while the Athenians lost only 192 hoplites. According to legend, a runner named Pheidippides ran the 26 miles from Marathon to Athens, delivered the news of victory ("Rejoice, we conquer!"), and collapsed dead from exhaustion, inspiring the modern 26.2-mile marathon race.
Xerxes' Invasion: Thermopylae and Salamis (480 BCE)
Ten years later, Darius's son, Emperor Xerxes I, launched a massive invasion force composed of hundreds of thousands of soldiers and a navy of over 1,200 ships, crossing the Hellespont into Europe across two bridges made of lashed ships.
The Stand of the 300 at Thermopylae
In August 480 BCE, thirty-one allied Greek city-states met the Persian advance. King Leonidas of Sparta led a small blocking force of 300 Spartan royal guards and roughly 6,000 Greek allies to defend Thermopylae ("The Hot Gates")—a narrow coastal pass between steep mountains and the sea where the Persian numerical superiority was neutralized. For two days, Spartan hoplites repelled Persian waves, including Xerxes' elite "Immortals."
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| THE BATTLE AT THE PASS OF THERMOPYLAE |
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| STEEP MOUNTAIN WALLS |
| /\ |
| / \ |
| SPARTAN PHALANX / \ PERSIAN MASS ARMY |
| [Leonidas & 300 Spartans]/ \ [Waves of Immortals & |
| Narrow defile limits | NARROW | Infantry crushed by |
| engagement width | PASS | spears in bottle-neck] |
| \ / |
| \ / |
| \/ |
| GULF OF MALIA (SEA) |
| |
| (Traitor Ephialtes leads Persians around secret Anopaia path) |
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On the third day, a local Greek traitor named Ephialtes showed the Persians a hidden mountain path (the Anopaia trail) that bypassed the pass. Learning he was encircled, Leonidas dismissed the allied contingents and fought to the death alongside his 300 Spartans and 700 Thespians, sacrificing themselves to delay the Persian advance and allow Greece to organize its defense.
The Naval Trap at Salamis
Following Thermopylae, Xerxes marched through central Greece and burned an evacuated Athens to the ground. The Athenian naval visionary Themistocles had previously persuaded the Assembly to use silver discovered in the Laurium mines to construct 200 state-of-the-art warships called triremes.
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| THE ATHENIAN TRIREME WARSHIP |
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| Powered by 170 oarsmen arranged in three staggered tiers on each side;|
| equipped with a 300-pound bronze ram at the waterline: |
| |
| === Square Sail === |
| | |
| +--------+--------+ |
| BRONZE WATERLINE | Deck Hoplites | CURVED STERN |
| RAM | Oarsmen Tier 3 | DUAL RUDDER OARS |
| <=====\======| Oarsmen Tier 2 |========// |
| \ | Oarsmen Tier 1 | // |
| \----+-----------------+------// |
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Themistocles sent a slave to Xerxes' camp with a secret message, feigning betrayal and claiming the Greeks were panicking and preparing to flee. Trapped by the ruse, Xerxes sent his fleet into the narrow straits between the island of Salamis and the mainland. In the cramped waters, large Persian warships collided and could not maneuver. The agile Greek triremes rammed the flanks of the Persian vessels, destroying more than 200 enemy ships while Xerxes watched from a golden throne atop Mount Aigaleo. In 479 BCE, allied Greek hoplites defeated the remaining Persian land army at the Battle of Plataea, expelling the Persian threat permanently.
The Delian League and the Athenian Empire
Following their victory, Greek city-states recognized that Persia still threatened Aegean islands and Ionian ports. In 478 BCE, they formed the Delian League, a mutual naval alliance centered on the sacred island of Delos.
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| THE RISE OF ATHENIAN IMPERIALISM |
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| 1. MUTUAL ALLIANCE (478 BCE): Island city-states contribute warships |
| or cash tribute (*phoros*) to common defense fund on Delos. |
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| v |
| 2. FINANCIAL HEGEMONY: Athens commands the fleet; treats cash |
| contributions as tribute payments to Athenian city treasury. |
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| v |
| 3. COERCION: City-states that attempt to leave (Naxos, Thasos) are |
| attacked by Athenian fleets, stripped of walls, forced to obey. |
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| v |
| 4. THE PERICLEAN SHIFT (454 BCE): Pericles moves treasury from Delos |
| to Athens; uses funds to build the Parthenon and public works. |
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Under Athenian leadership, the Delian League transformed into an Athenian maritime empire. Athens forced members to pay cash tribute (phoros), prevented members from withdrawing, and imposed Athenian coinage, weights, and garrisons. In 454 BCE, Pericles moved the league's treasury from Delos to the Athenian Acropolis, using allied defense funds to construct the Parthenon and subsidize Athenian democracy.
The Peloponnesian War (431–404 BCE)
Alarmed by the expansion of Athenian imperial and naval power, Sparta and its allies in the Peloponnesian League declared war on Athens in 431 BCE. The historian Thucydides, who fought in the conflict and wrote its history, observed: "The growth of the power of Athens, and the alarm which this inspired in Lacedaemon, made war inevitable."
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| THE TWO STRATEGIC WARFARE DOCTRINES |
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| ATHENIAN STRATEGY (PERICLES) | SPARTAN STRATEGY (ARCHIDAMUS) |
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| - Avoid open land pitched battles | - Annual summer infantry invasions|
| against superior Spartan phalanx| of Attica; burn grain fields. |
| - Retreat all rural population | - Provoke Athenian army to march |
| inside the Long Walls of Athens | out of walls for battle. |
| - Rely on deep-water port Piraeus | - Win over Athenian allies by |
| and navy to import all grain | promising "freedom for Greece." |
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The Long Walls and the Plague of Athens
Pericles formulated a defensive strategy: refusing open battle against Sparta's invincible hoplites, he ordered all rural residents of Attica to abandon their farms and retreat behind the Long Walls—parallel stone fortifications connecting Athens to its fortified port of Piraeus, four miles away. As long as Athenian ships brought grain into Piraeus, Athens could hold out indefinitely.
However, cramming over 200,000 citizens into unhygienic conditions inside the city walls led to disaster. In 430 BCE, a virulent epidemic (historians suspect typhus, typhoid, or measles) struck Athens. Over four years, the plague killed one-third of the Athenian population, including Pericles. Deprived of Pericles' prudent guidance, Athens fell under the influence of demagogues like Cleon and Alcibiades.
The Catastrophic Sicilian Expedition (415–413 BCE)
In 415 BCE, persuaded by the charming and reckless aristocrat Alcibiades, Athens launched the Sicilian Expedition—a naval armada consisting of 134 triremes and 27,000 hoplites and rowers sent across the Mediterranean to conquer the wealthy city of Syracuse in Sicily.
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| THE SICILIAN EXPEDITION DISASTER |
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| 1. AMBITION: Athens sends massive armada to conquer Syracuse. |
| 2. STALEMATE: Spartan general Gylippus arrives to organize Syracuse. |
| 3. TRAP: Syracusan fleet closes the Great Harbor of Syracuse. |
| 4. ANNIHILATION: Entire Athenian expedition force captured or killed; |
| 7,000 surviving Athenians imprisoned in blistering limestone |
| quarries of Syracuse; 200 triremes lost; prestige shattered. |
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The expedition was a military catastrophe. Led by the indecisive general Nicias and countered by Spartan reinforcements under General Gylippus, the Athenian fleet was trapped within Syracuse's Great Harbor. The entire Athenian armada was destroyed; tens of thousands of hoplites were slaughtered or marched into open-air limestone quarries, where they died of exposure and starvation. Athens never recovered from the loss of its manpower and fleet.
The Fall of Athens (404 BCE)
Recognizing that Athens could only be defeated by cutting its grain supply lines, Sparta formed an alliance with its former enemy: the Persian Empire. Persia provided gold to finance a Spartan war fleet, commanded by the admiral Lysander. In 405 BCE, Lysander ambushed the remaining Athenian fleet at Aegospotami in the Hellespont, cutting off grain imports from the Black Sea.
Starved into submission, Athens surrendered in 404 BCE. Sparta tore down the Long Walls to the music of flutes, dismantled the Athenian navy, and installed a brutal oligarchy of thirty pro-Spartan aristocrats, known as the "Thirty Tyrants." While democracy was restored a year later, the Golden Age of Greece was ended; decades of continuous civil warfare left all Greek city-states exhausted and vulnerable to conquest from the north.
Review Exercises
Exercise 1: Describe the causes and key events of the Battle of Marathon (490 BCE), explaining the tactical brilliance of Miltiades.
Exercise 2: Describe the Greek defensive strategy during Xerxes' invasion in 480 BCE, comparing the land action at Thermopylae with the naval engagement at Salamis.
Exercise 3: Explain the structural causes of the Peloponnesian War as analyzed by Thucydides, detailing the strategic disasters (the plague and the Sicilian Expedition) that doomed Athens.
Solutions
Solution 1: The Battle of Marathon was triggered by King Darius I's desire to punish Athens for aiding the Ionian Revolt. Landing at Marathon, the Persian army was met by 10,000 Athenian hoplites led by Miltiades. Miltiades weakened his center and reinforced his wings; when the Persian archers pushed through the center, the Athenian wings crushed the Persian flanks, encircled the enemy, and drove the Persians back into their ships with heavy casualties, proving that Greek hoplites could defeat Persian forces.
Solution 2: In 480 BCE, allied Greek city-states used geography to neutralize Persian numbers. At the narrow mountain pass of Thermopylae, King Leonidas and his 300 Spartans sacrificed themselves to hold back hundreds of thousands of Persians for three days. Meanwhile, Athenian leader Themistocles lured the Persian navy into the narrow straits of Salamis, where bulky Persian ships could not maneuver and were rammed and destroyed by agile Greek triremes, forcing Xerxes to retreat.
Solution 3: As Thucydides analyzed, the fundamental cause of the Peloponnesian War was Spartan fear of growing Athenian imperial and naval dominance. During the war, Athens' plan to retreat inside the Long Walls backfired when an epidemic swept the crowded city, killing a third of the population, including Pericles. Later, in 415 BCE, Athens launched the disastrous Sicilian Expedition against Syracuse, which resulted in the loss of its navy and tens of thousands of soldiers, allowing Sparta—backed by Persian gold—to starve Athens into surrender in 404 BCE.