In the morning the sea was still rough, but the Greeks came out of the strait, and, without committing themselves to a general action, fell upon the nearest ships, the squadron of Cilicia, and sank and captured several of them, retiring when the main fleet began to close upon them. On the third day the sea was calm and the Persians tried to force the narrows by a frontal attack. There was some hard fighting and loss on both sides, but the Greeks held their own. As the sun set the Persians rowed back towards their anchorage inside Cape Sepias.
When the sun rose again the Greek fleet had disappeared. Eurybiades and Themistocles had agreed in the night after the battle that the time was come to abandon the defence of the Eubœan Strait and retire to the waters of Salamis. The Persian army was now flooding the mainland with its myriads of fighting men, and was master of Attica. A fleet, depending so much on the land for supplies and for rest for its crews, could not maintain itself in the straits when the Persians held the mainland and were in a position to seize also the island of Eubœa. Before sunrise the Greek ships were working their way in long procession through the Strait of Negropont. Early in the day they began to pass one by one the narrows at Chalcis, now spanned by a bridge. Then the strait widened, and there were none to bar their way to the open sea, and round Cape Sunium to their sheltered station in the straits behind the island of Salamis.
They had been reinforced on the way, and they now numbered 366 fighting ships. Those of Sparta and the Peloponnesus were 89, the Athenian fleet 180, while 97 more were supplied by the Greek islands, some of the ships from Melos and the Cyclades being penteconters, large vessels whose long oars were each manned by five rowers. Losses by storm and battle had reduced the Persian armada to some six hundred effective ships. The odds were serious, but not desperate.
But while the Persian fleet was directed by a single will, there were divided counsels among the Greeks. Eurybiades had most of the leaders on his side when he argued that Athens was hopelessly lost, and the best hope for Greece was to defend the Peloponnesus by holding the isthmus of Corinth with what land forces could be assembled and removing the fleet to the waters of the neighbouring waters to co-operate in the defence. Themistocles, on the other hand, shrank from the idea of abandoning the refugees in the island of Salamis, and he regarded the adjacent straits as the best position in which the Greeks could give battle. There, as in the channel of Eubœa, the narrow waters would do something to nullify the Persian advantage of numbers. For the Greeks, formed in several lines extending from shore to shore, could only be attacked by equal numbers. Only the leading ships of the attack would be in action at any given moment, and it would not matter how many hundred more were crowded behind them. With a column of spearmen on land the weight of the rearward ranks, formed in a serried phalanx, would force onward those in front. But with a column of ships formed in several successive lines in narrow waters any attempt of the rearward ships to press forward would mean confusion and disaster to themselves and those that formed the leading lines. This would have been true even of ships under sail, but in battle the war galleys were oar-driven, and as the ships jammed together there would be entangled oars, and rowers flung from their benches with broken heads and arms. Better discipline, more thorough fighting-power on the Greek side, would mean that the leading ships of their fleet would deal effectually with their nearest adversaries, while the rearward ships would rest upon their oars and plunge into the mêlée only where disaster to a leading ship left an opening.
A doubtful story says that Themistocles, foreseeing that if the battle was long delayed the Spartan party would carry their point and withdraw to the isthmus, ran the risk of sending a message to King Xerxes, urging him to attack at once, hinting at a defection of the Athenian fleet, and telling him that if he acted without delay the Greeks were at his mercy, and that they were so terrified that they were thinking chiefly of how they might escape. Herodotus tells of a council of war of the Persian leaders at which the fighting Queen Artemisia stood alone in advising delay. She told the King that in overrunning northern Greece he had done enough for one campaign. Let him settle down for winter quarters in Attica and he would see the Greek armament, already divided by jealousies and quarrels, break up and disperse. He could then prepare quietly for the conquest of the Peloponnesus in the spring. But Xerxes was more flattered by the opinion of the satraps who told him that he had only to stretch out his hands to destroy the Greek fleet and make himself undisputed master of the sea. And, just as Themistocles was despairing of being able to keep the fleet at Salamis, news came that the Persians had decided to attack. The news was brought by Aristides, the son of Lysimachus, who had been unjustly exiled from Athens some years before, but now in the moment of his country's danger ran the blockade of the Persians in a ship of Ægina, and came to throw in his lot with his fellow-citizens. For the Greeks to set out for the isthmus under these circumstances would be to risk having to meet superior numbers in the open sea. All now agreed that the fate of Greece was to be decided in the waters of Salamis.
Xerxes looked forward to the coming struggle with assured hope of victory, and prepared to enjoy the spectacle of the disaster that was about to fall upon his enemies.
On the green slope of Mount Ægaleos, which commanded a full view of Salamis and the straits, the silken tents of the King and his Court were erected, a camp that was like a palace. Purple-dyed hangings, gilded tent poles with pomegranates of pure gold at the top of each, carpets bright with colour, carved furniture inlaid with ivory, all made up a display of luxurious pomp. Before the royal tents a golden throne had been erected. Fan-bearers took their post on either side, nobles who held the office of sword-bearers and cup-bearers waited at the steps of the throne. On either side and on the slope below the ranks of the "Immortal Guard" were formed, ten thousand veterans, with armour and equipments gleaming with silver and gold. Along the shore from the white marble cliffs of Sunium by the port of Phalerum and far up the winding coast-line of the straits, hundreds of thousands more of this army of many nations stood in battle array. They were to witness the destruction of the Great King's enemies, and to take an active part in it when, as all expected, disabled Greek galleys would be driven ashore, and their crews would ask in vain for quarter. They were to share, too, in the irruption into Salamis once the fleet was master of the straits, and when the people of Athens, no longer protected by the sea, would be at the mercy of the Asiatic warriors.
Amid the blare of trumpets the King took his seat upon his throne, and watched his great armada sweeping towards the straits like a floating city. In those hundreds of long, low-sided ships thousands of slaves strained at the banks of heavy oars, encouraged by the shouts of the picked warriors who crowded the decks, and if their energies flagged, stimulated to new exertions by the whip of their taskmasters.
From every point of vantage in Salamis, women, old men, children, all who could not fight, looked out upon the sea, watching with heart-rending anxiety the signs of the approaching struggle. Death or slavery and untold misery would be their fate if numbers should prevail in the battle. In our days, in the hours before such a decisive struggle a people watches the newspapers, and waits for tidings of the fight in a turmoil of mingled hopes and fears. But whatever may be the result the individual, who is thus a spectator at a distance, runs no personal risks. It was otherwise in those days of merciless heathen warfare, and here all would see for themselves the changing fortunes of the fight on which their own fate depended.
The Greek fleet had been formed in two divisions of unequal strength. The smaller anchored in the western opening of the straits, furthest from the advance of the enemy's armada, and was detailed to prevent any attack through the narrows on the Greek rear. The main body, three hundred strong, was moored in successive lines, just inside the opening of the straits to the eastward. The best ships, the most trusted leaders, the picked warriors were in the foremost line. On them the result of the day would chiefly depend, and here the man who had planned it all, commanded an Athenian war galley in the centre of the array. In this fact we see another striking difference between past and present. The modern specialization of offices and capacities which divides between different individuals the functions of political leader, general, and admiral was yet centuries distant in the future. Themistocles, who had advised the policy of naval war, was to be the foremost leader in the battle, and though purely naval tactics were to have some part in it, it was to be to a great extent a land battle fought out on floating platforms, so that one who had learned the art of war on land could act as an admiral on the sea.