=159.= Incensed at the interference of Athens, the Corinthians sought revenge by uniting with Prince Perdic´cas of Macedonia, to stir up revolts among the Athenian tributaries in the Chalcidic peninsulas. A battle ensued at Olynthus, in which the Athenians were victorious over the Corinthian general, and blockaded him in Potidæa, where he had taken refuge.
A congress of the Peloponnesian states was held at Sparta, and complaints from many quarters were uttered against Athens. The Æginetans deplored the loss of their independence; the Megarians, the crippling of their trade; the Corinthians, that they were overshadowed by the towering ambition of their powerful neighbor. At the same time, the Corinthians contrasted the restless activity of Athens with the selfish inertness of Sparta, and threatened that if the latter still delayed to do her duty by the League, they would seek a more efficient ally.
The envoys having departed, Sparta decided to undertake the war. Before proceeding to actual hostilities, it was thought best to send messengers to Athens, demanding, among other things, that she should “expel the accursed” from her presence—referring to Pericles, whose race they chose to consider as still tainted with sacrilege. But Pericles replied that the Spartans themselves had heavy accounts to settle on the score of sacrilege, not only for starving Pausanias in the sanctuary of Athena, but for dragging away and murdering the Helots who had taken refuge, during the late revolt, in the temple of Posidon. The other demands were rejected, though with more hesitation. They concerned the independence of Megara and Ægina, and, generally, the abdication by Athens of her position as head of the League. The Athenians declared that they would refrain from commencing hostilities, and would make just satisfaction for any infringement on their part of the thirty years’ truce; but that they were ready to meet force with force.
=160.= WAR IN BŒOTIA. While both parties hesitated to begin the war, the Thebans precipitated matters by a treacherous attack upon the city of Platæa. This city, instead of joining the Bœotian League, had been in friendly alliance with Athens, and was hence regarded with great jealousy by the Thebans. A small oligarchical party in Platæa favored the Thebans, and it was Naucli´des, the head of this party, who, at dead of night, admitted three hundred of them into the town. The Platæans were roused from sleep to find their enemies encamped in their market-place; but though scattered and betrayed, they did not yield. They secretly communicated with each other by breaking through the walls of their houses; and having thus formed a plan for defense, fell upon the enemy a little before daybreak.