The preparations and invasion of Xerxes (480 BC), the Hellenic League, the battles of Thermopylae, Artemisium, and Salamis, and the strategic role of Themistocles' naval policy

A 25-mark essay needs the naval policy, strategy, battle, and a verdict.

Thesis

Themistocles was decisive at every stage: naval policy, choice of Salamis, Sicinnus stratagem, tactical conduct.

Naval policy (483/2 BC)

Laurion silver produced 100 talents. Themistocles persuaded the Assembly to spend it on 200 triremes (Herodotus 7.144), framed as war with Aegina.

Hellenic League

The congress at the Isthmus (autumn 481 BC). Themistocles argued for forward defence at Tempe, then Thermopylae-Artemisium, then Salamis.

Artemisium (August 480 BC)

Three days; a storm wrecked Persian ships. Withdrew after Thermopylae.

Evacuation of Attica

The Themistocles Decree moved civilians to Troezen, able-bodied to the fleet.

Choice of Salamis

Themistocles argued for Salamis. He sent Sicinnus to Xerxes with the false message that the fleet would flee; Xerxes blocked both ends (Herodotus 8.75).

The battle

700 Persian ships entered the narrows. 380 Greek triremes counter-attacked. Persian numbers neutralised; ramming told. Persia lost 200 to 300 ships; the Greeks 40. Aeschylus recreates it in the Persians (472 BC).

Historiography

Herodotus dominant. Burn (Persia and the Greeks, 1962). Holland (Persian Fire, 2005). Cawkwell (The Greek Wars, 2005).

Verdict

Themistocles was the decisive individual; without him no fleet and no Salamis.

A 7-mark "describe" needs the strategic context, the three days, and the significance.

Strategic context

The Hellenic League chose Thermopylae, a narrow coastal pass between Mount Kallidromos and the Malian Gulf, to block Xerxes's land army. The naval force at Artemisium covered the seaward flank.

The forces

Around 7,000 Greeks under King Leonidas I of Sparta: 300 Spartiates, 700 Thespians, 400 Thebans, and contingents from other states. The Persian army was vastly larger, perhaps 100,000 combatants (Herodotus's 1,700,000 is impossible).

Days 1 and 2 (mid August 480 BC)

Two days of frontal Persian assaults on the narrow pass. The Spartan and other hoplites held; even the Immortals were repulsed.

The betrayal

A local, Ephialtes of Trachis, showed Xerxes the Anopaea path over the mountain. The Phocian guards on the path were brushed aside.

Day 3

Leonidas dismissed most of the Greek contingents but remained with the 300 Spartiates, the 700 Thespians (voluntarily), and the 400 Thebans (held by force, Herodotus 7.222). They fought to the death. Leonidas was killed; the Spartans defended his body. Two Spartiates were sent home: one in disgrace, one who later redeemed himself at Plataea (Herodotus 7.231 to 232).

Significance

Thermopylae did not delay Xerxes significantly but became a Greek moral victory. The Simonides epitaph "Go tell the Spartans, you who pass by, that here, obedient to their laws, we lie" was inscribed on the battlefield.

Markers reward strategic context, the three days, the Anopaea path, and significance.

2 marks per feature, to 4 marks total.

Feature 1: the "strait" (1 mark) and why it mattered (1 mark). The plaque's word "strait" refers to the narrow channel between the island of Salamis and the Attic mainland. The narrows meant the numerically superior Persian fleet (perhaps 700 ships against a Greek 380) could not deploy its full width and became crowded and unmanageable, negating its size advantage.

Feature 2: "the barbarian fleet" as a joint Greek achievement (1 mark) tied to the alliance (1 mark). The plaque credits "the Athenians and their allies," reflecting that the victory was a Hellenic League effort under overall Spartan command (Eurybiades) with the largest single contingent, 180 ships, supplied by Athens.

Markers reward accurate use of the source's wording plus correct supporting detail (numbers, command structure) from own knowledge. Full marks require both features fully outlined, not merely named.

2 marks per accurate preparation, to 4 marks total (any two of the following, each with a supporting detail).

The Athos canal

Dug through the isthmus at the foot of Mount Athos over roughly three years, so the fleet could avoid rounding the headland where a Persian fleet had been wrecked by storm in 492 BC; archaeology has confirmed the line of the cutting.

The Hellespont bridges

Two pontoon bridges of ships lashed together carried the army from Abydos in Asia to Europe; the first attempt was destroyed by a storm and rebuilt.

Stockpiled supply depots

Magazines of food were laid along the invasion route through Thrace and Macedonia to sustain an army modern historians put at roughly 100,000 to 200,000 combatants (Herodotus's 1,700,000 is not credible).

Markers reward named, dated preparations over generic description ("he prepared a big army").

6 marks: 2 for what happened, 2 for the leadership decision, 2 for the strategic consequence.

What happened

Delegates from around thirty-one Greek states met at the Isthmus in autumn 481 BC and swore an oath to resist Persia, forming the Hellenic League, the first sustained pan-Hellenic military alliance; most of central and northern Greece nonetheless later medised.

The leadership decision

Sparta, as the strongest land power, took overall command by both land and sea; Athens, though it supplied the largest fleet, ceded naval command to the Spartan Eurybiades (Herodotus 8.2 to 3) to hold the coalition together.

The strategic consequence

The League could then debate and settle a common defensive strategy rather than each state acting alone, moving from an initial plan to hold the Vale of Tempe to the linked positions at Thermopylae and Artemisium, and ultimately to Themistocles's case for Salamis.

Markers reward the causal chain from the congress to the later unified strategy, not just a description of the meeting.

6 marks: 2 reliability, 2 usefulness, 2 linking both to a judgement.

Reliability

As an ExamExplained reconstruction written in the style of a much later chronicle, it is not a primary account and should be treated as illustrative; even genuine later sources on Thermopylae (for example Diodorus) rewrite and moralise the episode long after 480 BC, so any such source needs to be checked against Herodotus, writing within a generation of the event and the closest surviving account.

Usefulness

The phrase "law and shame" is useful because it captures a real Spartan value, discipline under law reinforced by fear of disgrace (the fate of the "tremblers" who survived Thermopylae shows this was a lived pressure), but it is limited because it omits practical strategic reasons historians also weigh, such as covering the retreat of the rest of the army and honouring the Delphic oracle that a Spartan king must die for Sparta to be saved.

Judgement

The source is useful for the cultural motive but must be supplemented with Herodotus (7.220 to 232) for the strategic and religious motives; no single motive fully explains the decision.

Markers reward explicit reliability AND usefulness analysis (not just paraphrase) and a supported judgement.

A 20-mark essay needs a clear thesis, evidence-based argument across naval policy, strategy and the battle itself, engagement with historiography, and a sustained verdict answering "to what extent."

Thesis

Themistocles was the single most decisive individual, shaping the material means of victory (the fleet), the strategic choice of battlefield (Salamis), and the tactical trap that forced the engagement, though the League's collective institutions and other commanders were also indispensable.

Argument line 1: the fleet

In 483/2 BC Themistocles persuaded the Assembly to spend the Laurion silver windfall of around 100 talents on 200 triremes rather than distribute it, framing the proposal as preparation for war with Aegina (Herodotus 7.144). Without this fleet there was no Greek navy capable of contesting Artemisium or Salamis at all.

Argument line 2: strategy at the Isthmus and after Thermopylae

Themistocles argued within the League for the forward defence at Thermopylae-Artemisium and then, after that line fell, against the Peloponnesian preference to abandon Attica and defend only the Isthmus; he argued instead for committing the fleet at Salamis, where the narrows would neutralise Persian numbers.

Argument line 3: the Sicinnus stratagem and the battle

Themistocles sent his slave Sicinnus to Xerxes with the false message that the Greek fleet intended to flee, provoking Xerxes to block both exits of the strait overnight (Herodotus 8.75) and making the battle Xerxes now wanted to avoid unavoidable for both sides. In the resulting battle the crowded, wide Persian fleet of perhaps 700 ships could not manoeuvre; the Greeks' 380 triremes, with better-trained crews, sank or disabled 200 to 300 Persian ships for a loss of around 40.

Counter-argument (to earn "to what extent")

Themistocles did not act alone: Eurybiades held formal Spartan command and kept the coalition intact; Aristides confirmed the blockade and led a supporting land action against Persian troops stranded on Psyttaleia; the storm off Artemisium, not Greek skill, destroyed perhaps a quarter of the Persian fleet before Salamis even began; and the Hellenic League's oath at the Isthmus (481 BC) created the alliance Themistocles then persuaded, rather than acting independently of it.

Historiography

Herodotus (Histories 7 to 8) is broadly favourable to Themistocles but was writing within living memory of informants who included his rivals, so his account should be read as shaped by later Athenian tradition. A.R. Burn (Persia and the Greeks, 1962) credits Themistocles as the war's outstanding strategist. Tom Holland (Persian Fire, 2005) stresses the fragility of the coalition Themistocles had to manage as much as his tactical cunning. George Cawkwell (The Greek Wars, 2005) is more sceptical, arguing Herodotus's Themistocles-centred narrative understates the collective Spartan and Corinthian contribution.

Model paragraph (naval policy, one paragraph of the full response)

"Themistocles's clearest claim to decisiveness lies in the naval law of 483/2 BC. Rather than distribute the Laurion windfall of about 100 talents to citizens, as had been customary, he persuaded the Assembly to fund 200 triremes, ostensibly against Aegina but in practice against the anticipated Persian invasion (Herodotus 7.144). This single political act created the material precondition for every later Athenian contribution to the war: without it, the largest contingent at Artemisium and Salamis, 180 Athenian ships, simply would not have existed, and the Hellenic League's naval strategy of a forward line at Artemisium, later a stand at Salamis, would have been unavailable to argue for. Burn (1962) treats this vote as the single most consequential Athenian political decision of the invasion, a judgement the subsequent battles bear out." Marker's note: this paragraph earns marks by naming the figure (100 talents, 200 ships, 180 Athenian ships at Salamis), quoting the source (Herodotus 7.144), citing a named historian's assessment, and tying the evidence directly back to the "decisive individual" question rather than merely narrating events.

Verdict

To a very large extent Themistocles was decisive, since the fleet, the strategy and the trap at Salamis all trace to his initiative, but the victory required the Hellenic League's unity, Eurybiades's formal command and considerable Persian misfortune, so "decisive" should be qualified as "the most important of several necessary factors" rather than sole cause.

Markers reward a sustained argument that directly answers "to what extent," precise figures and dates, at least two named historians used to build (not just list) the argument, and a model paragraph meeting the standard above.

A 25-mark essay needs balanced treatment of both linked engagements, tactical detail, the betrayal, the storm, and a reasoned evaluation of significance for the wider war.

Thesis

Although both a Spartan-led land defeat and a naval battle Herodotus records as inconclusive, Thermopylae and Artemisium were jointly significant less for their immediate tactical result than for buying the League time to organise the evacuation of Attica, testing and refining the trireme tactics used at Salamis, and creating the moral exemplar, Leonidas and the 300, that sustained Greek resolve through the loss of Athens.

The linked positions

The Hellenic League chose Thermopylae, a narrow pass between Mount Kallidromos and the Malian Gulf, and Artemisium, on the northern coast of Euboea, as a single defensive line: land and sea positions covering each other's flank so neither could be turned by the other route.

Thermopylae, days 1 and 2

Around 7,000 Greeks, including 300 Spartiates under King Leonidas I, repelled repeated frontal Persian assaults, including the elite Immortals, in the confined pass where Persian numbers (perhaps 100,000 to 200,000 in the invading force, against Herodotus's incredible 1,700,000) could not be brought to bear.

The betrayal and day 3

Ephialtes of Trachis showed Xerxes the Anopaea mountain path; the Phocian guard on it was brushed aside at dawn. Leonidas dismissed most contingents but stayed with 300 Spartiates, 700 Thespians (volunteers) and 400 Thebans (Herodotus says held against their will, 7.222); all were killed, commemorated by Simonides's epitaph on the site.

Artemisium

Simultaneously, 271 (rising to 380) Greek triremes fought the Persian fleet to a tactical draw over three days; crucially, a separate storm off Magnesia wrecked perhaps 400 Persian ships while the sheltered Greek fleet was untouched. The Greek fleet withdrew only after news of Thermopylae reached it.

Significance for the outcome

Tactically Persia won both engagements and marched on to burn Athens, so the immediate military result favoured Xerxes. Strategically, the delay allowed the evacuation of Attica under the Themistocles Decree, preserving the population and the alliance rather than forcing a hopeless last stand; the naval experience at Artemisium let Greek crews test the close-formation tactics that shattered the Persian fleet at Salamis weeks later; and the moral effect of Leonidas's stand held the fracturing League together at its lowest point.

Historiography

Herodotus frames Thermopylae as a moral triumph within military defeat. Paul Cartledge (Thermopylae: The Battle That Changed the World, 2006) argues the battle's true significance is ideological, forging a Panhellenic myth of resistance, more than tactical. Peter Green (The Greco-Persian Wars, 1996) is more sceptical of the "delay" argument, noting Xerxes' advance was barely slowed.

Marker's note (model conclusion paragraph)

"Weighing tactical defeat against strategic and moral gain, Thermopylae and Artemisium should be judged significant chiefly as the hinge that made Salamis possible: the delay bought the evacuation, the naval trial informed later tactics, and Leonidas's sacrifice supplied the resolve that held the League together after Athens fell. Cartledge's reading of the battle as myth-making captures why its significance outlasted its tactical failure." This earns marks for directly answering "evaluate," citing a named historian, and tying the judgement to specific, dated evidence rather than narrating the battle alone.

Markers reward sustained evaluation (not narrative), accurate figures/dates for both engagements, the storm as a distinct causal factor, and named historiography used to support the judgement.