Many reasons thus combined to hasten their departure and to make this invasion a very short one; indeed they only stayed fifteen days in Attica.
About the same time the Athenian general Simonides getting together a few Athenians from the garrisons, and a number of the allies in those parts, took Eion in Thrace, a Mendaean colony and hostile to Athens, by treachery, but had no sooner done so than the Chalcidians and Bottiaeans came up and beat him out of it, with the loss of many of his soldiers.
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.