History of the Peloponnesian War

The Peloponnesians also set up a trophy as victors for the defeat inflicted upon the ships they had disabled in shore, and dedicated the vessel which they had taken at Achaean Rhium, side by side with the trophy.

After this, apprehensive of the reinforcement expected from Athens, all except the Leucadians sailed into the Crissaean gulf for Corinth.

Not long after their retreat, the twenty Athenian ships, which were to have joined Phormio before the battle, arrived at Naupactus.

Thus the summer ended. Winter was now at hand; but before dispersing the fleet, which had retired to Corinth and the Crissaean gulf, Cnemus, Brasidas, and the other Peloponnesian captains allowed themselves to be persuaded by the Megarians to make an attempt upon Piraeus, the port of Athens, which from her decided superiority at sea had been naturally left unguarded and open.

Their plan was as follows:—The men were each to take their oar, cushion, and rowlock thong, and going overland from Corinth to the sea on the Athenian side, to get to Megara as quickly as they could, and launching forty vessels, which happened to be in the docks at Nisaea, to sail at once to Piraeus.

There was no fleet on the look-out in the harbor, and no one had the least idea of the enemy attempting a surprise; while an open attack would, it was thought, never be deliberately ventured on or if in contemplation, would be speedily known at Athens. Their plan formed, the next step was to put it in execution.