On the return of the Peloponnesians from Attica, the Spartans themselves and the nearest of the Perioeci at once set out for Pylos, the other Lacedaemonians following more slowly, as they had just come in from another campaign. Word was also sent round Peloponnese to come up as quickly as possible to Pylos; while the sixty Peloponnesian ships were sent for from Corcyra, and being dragged by their crews across the isthmus of Leucas, passed unperceived by the Athenian squadron at Zacynthus, and reached Pylos, where the land forces had arrived before them. Before the Peloponnesian fleet sailed in, Demosthenes found time to send out unobserved two ships to inform Eurymedon and the Athenians on board the fleet at Zacynthus of the danger of Pylos and to summon them to his assistance. While the ships hastened on their voyage in obedience to the orders of Demosthenes, the Lacedaemonians prepared to assault the fort by land and sea, hoping to capture with ease a work constructed in haste, and held by a feeble garrison. Meanwhile, as they expected the Athenian ships to arrive from Zacynthus, they intended, if they failed to take the place before, to block up the entrances of the harbour to prevent their being able to anchor inside it. For the island of Sphacteria, stretching along in a line close in front of the harbour, at once makes it safe and narrows its entrances, leaving a passage for two ships on the side nearest Pylos and the Athenian fortifications, and for eight or nine on that next the rest of the mainland: for the rest, the island was entirely covered with wood, and without paths through not being inhabited, and about one mile and five furlongs in length. The inlets the Lacedaemonians meant to close with a line of ships placed close together, with their prows turned towards the sea, and, meanwhile, fearing that the enemy might make use of the island to operate against them, carried over some heavy infantry thither, stationing others along the coast. By this means the island and the continent would be alike hostile to the Athenians, as they would be unable to land on either; and the shore of Pylos itself outside the inlet towards the open sea having no harbour, and, therefore, presenting no point which they could use as a base to relieve their countrymen, they, the Lacedaemonians, without sea-fight or risk would in all probability become masters of the place, occupied as it had been on the spur of the moment, and unfurnished with provisions. This being determined, they carried over to the island the heavy infantry, drafted by lot from all the companies. Some others had crossed over before in relief parties, but these last who were left there were four hundred and twenty in number, with their Helot attendants, commanded by Epitadas, son of Molobrus.
Meanwhile Demosthenes, seeing the Lacedaemonians about to attack him by sea and land at once, himself was not idle. He drew up under the fortification and enclosed in a stockade the galleys remaining to him of those which had been left him, arming the sailors taken out of them with poor shields made most of them of osier, it being impossible to procure arms in such a desert place, and even these having been obtained from a thirty-oared Messenian privateer and a boat belonging to some Messenians who happened to have come to them.
Among these Messenians were forty heavy infantry, whom he made use of with the rest. Posting most of his men, unarmed and armed, upon the best fortified and strong points of the place towards the interior, with orders to repel any attack of the land forces, he picked sixty heavy infantry and a few archers from his whole force, and with these went outside the wall down to the sea, where he thought that the enemy would most likely attempt to land. Although the ground was difficult and rocky, looking towards the open sea, the fact that this was the weakest part of the wall would, he thought, encourage their ardour, as the Athenians, confident in their naval superiority, had here paid little attention to their defences, and the enemy if he could force a landing might feel secure of taking the place. At this point, accordingly, going down to the water's edge, he posted his heavy infantry to prevent, if possible, a landing, and encouraged them in the following terms:
"Soldiers and comrades in this adventure, I hope that none of you in our present strait will think to show his wit by exactly calculating all the perils that encompass us, but that you will rather hasten to close with the enemy, without staying to count the odds, seeing in this your best chance of safety. In emergencies like ours calculation is out of place; the sooner the danger is faced the better. To my mind also most of the chances are for us, if we will only stand fast and not throw away our advantages, overawed by the numbers of the enemy. One of the points in our favour is the awkwardness of the landing. This, however, only helps us if we stand our ground. If we give way it will be practicable enough, in spite of its natural difficulty, without a defender; and the enemy will instantly become more formidable from the difficulty he will have in retreating, supposing that we succeed in repulsing him, which we shall find it easier to do, while he is on board his ships, than after he has landed and meets us on equal terms. As to his numbers, these need not too much alarm you. Large as they may be he can only engage in small detachments, from the impossibility of bringing to.