Salamis & Naval Warfare
Athens and the Sea
The battle that truly saved Greece from Persian conquest was not fought on land but on the water. In 480 BC, the same year as Thermopylae, the Greek and Persian fleets clashed in the narrow strait between the island of Salamis and the Attic coastline. The result — a Greek victory — was a major turning point in the invasion. Xerxes returned to Asia with much of his army, but Mardonius remained in Greece with a substantial force.
Athens was central to the Greek naval effort. In the years before 480 BC, the Athenian statesman Themistocles had persuaded the Athenian assembly to invest a windfall of silver from the mines at Laurion in building a fleet of two hundred triremes. This decision transformed Athens into a major naval power and ultimately into the city that would save Greece.
The Trireme: Design and Crew
The trireme was the warship of its age. Its name refers to its three banks of oars, each bank rowed by a different tier of men. A trireme was roughly thirty-seven metres long and six metres wide, built of lightweight fir wood for speed rather than durability. The hull tapered to a sharp bronze ram at the prow — this was the trireme’s primary weapon. The vessel could be fitted with a mast and sail for open-water cruising but fought entirely under oar power, where it achieved remarkable speed.
A full crew numbered around two hundred men. Of these, about one hundred and seventy were rowers — the thalamites (lowest bank), zygites (middle bank) and thranites (upper bank). The thranites had the most exposed and physically demanding position, pulling the longest oars. The rest of the crew included ten to twenty hoplites stationed on deck to repel boarders, a handful of archers, the ship’s officers, and the keleustes (the stroke-caller), who beat time to keep the oarsmen synchronised. The trireme was a precision instrument that required continuous training to operate effectively.
A trireme was roughly 37 metres long with three banks of oars rowed by around 170 men in three tiers. It was built for speed and fought by ramming: the bronze ram at the prow was its primary weapon. Operating one required constant training.
Ramming Tactics
Naval battles in this period were decided not by cannon or archery from a distance but by ramming. A trireme aimed to hit an enemy ship at high speed, driving the bronze ram into the hull below the waterline to hole it and sink it, or to sweep along the side and shear off the oar blades — leaving the enemy crew unable to manoeuvre or escape. For these manoeuvres to work, the rowers needed near-perfect coordination and the helmsman exceptional skill.
The two main attack techniques were the diekplous — driving through a gap in the enemy line and then turning sharply to ram from behind — and the periplous — rowing around the end of the enemy line to attack from the flank or rear. Both required sea room to manoeuvre. Themistocles designed his trap at Salamis precisely around this: lure the larger Persian fleet into a narrow channel where their numerical advantage became worthless, and where the Greeks’ superior training would tell.
Themistocles’ strategic genius lay in recognising that the Greeks could not fight the Persians fleet to fleet in open water: Persian numbers would simply overwhelm them. The narrow strait between Salamis and the mainland, however, was roughly a kilometre wide at its narrowest point — not enough room for a large fleet to deploy freely or to use the periplous effectively.
According to Herodotus, Themistocles sent a message to Xerxes through a trusted slave, claiming that the Greek fleet was about to flee and that Xerxes should attack immediately to trap it. Xerxes took the bait, ordering his fleet to block all exits from the strait during the night. When dawn came, the cramped Persian fleet was already exhausted from rowing all night, while the Greeks had rested. The Persians found themselves unable to manoeuvre in the confined space. Greek triremes crashed through their lines, ramming and turning.
The Battle and Artemisia
The battle of Salamis took place in September 480 BC. Xerxes watched from a golden throne set up on the slopes of Mount Aigalos overlooking the strait. What he saw was the steady destruction of his fleet. The Persian ships, too many for the confined space, were bunched together. When one was rammed and began to sink, it blocked the manoeuvres of others. The Greeks, fighting in organised lines, pushed the Persians back towards their own shore.
One of the most striking figures at Salamis in ancient accounts was Artemisia, the queen of Halicarnassus, who commanded her own ships in the Persian fleet. Herodotus reports that Xerxes admired her competence above all his other commanders. At Salamis, finding her ship under pursuit, she rammed another Persian vessel — possibly to escape or because she mistook it for a Greek ship. Xerxes, watching from the shore, saw what looked like an act of great boldness. The Athenian ship pursuing her broke off, thinking that Artemisia must be a Greek ally. She escaped unharmed.
Themistocles tricked Xerxes into sending his fleet into the narrow strait at night, exhausting his rowers while the Greeks rested. At dawn, the cramped Persian fleet could not manoeuvre; the more agile Greek triremes rammed through their lines and destroyed hundreds of ships. Xerxes watched his fleet collapse from a hilltop throne.
Visual Evidence: the Lenormant Trireme Relief
The Lenormant Trireme Relief is a fragment of carved marble, found on the Acropolis at Athens and now in the Acropolis Museum. It shows the upper portion of a trireme’s prow, with the thranites (upper-tier oarsmen) visible. The rowers are shown hunched forward, pulling hard. The detail is remarkable: individual oar-handles are visible, and the relative position of the rowers in their cramped benches gives a real sense of the physical demand of trireme warfare. A helmsman figure appears at the stern. The relief probably dated from around the late fifth century BC and was commissioned to celebrate Athenian naval power.
What the Lenormant relief makes vivid is the human reality of trireme warfare: victory depended not on brave hoplites in shining armour but on the coordinated muscle and discipline of hundreds of ordinary men, most of them the poorest citizens of Athens. Their contribution to Salamis gave them a political claim that proved impossible to ignore: after the Persian Wars, Athenian democracy deepened significantly, in part because of what the fleet rowers had done.
After Salamis, Xerxes returned to Asia with much of his army, leaving his general Mardonius in Greece with a substantial land force. Mardonius overwintered in Boeotia and Thessaly, then recaptured Athens in 479 BC. His army was defeated at Plataea later that year, ending the Persian invasion.
For Athens, the victory reinforced the centrality of sea power to Athenian identity and empire. The Persian Wars became the founding narrative of the Athenian fifth-century golden age — the period that produced the Parthenon, the tragedies of Sophocles and the philosophy of Socrates. Salamis was commemorated in art, drama and poetry as proof that Athens had saved Greece, a claim the Athenians never let the rest of Greece forget.