Thucydides, History of the Peloponnesian War
Benjamin Jowett, Ed.

105. An Athenian fleet made a descent upon Halieis, where a battle took place against some Corinthian¹ and Epidaurian troops; the Athenians gained the victory. Soon afterwards the Athenians fought at sea off Cecryphaleia with a Peloponnesian fleet, which they defeated. [2] A war next broke out between the Aeginetans and the Athenians, and a great battle was fought off the coast of Aegina, in which the allies of both parties joined; the Athenians were victorious, and captured seventy of the enemy's ships; they then landed on Aegina and, under the command of Leocrates the son of Stroebus, besieged the town. [3] Thereupon the Peloponnesians sent over to the assistance of the Aeginetans three hundred hoplites who had previously been assisting the Corinthians and Epidaurians. The Corinthians seized² on the heights of Geraneia, and thence made a descent with their allies into the Megarian territory, thinking that the Athenians, who had so large a force absent in Aegina and in Egypt, would be unable to assist the Megarians; or, if they did, would be obliged to raise the siege of Aegina. [4] But the Athenians, without moving their army from Aegina, sent to Megara under the command of Myronides a force consisting of their oldest and youngest men, who had remained at home. [5] A battle was fought, which hung equally in the balance; and when the two armies separated, they both thought that they had gained the victory. [6] The Athenians, who did however get rather the better, on the departure of the Corinthians erected a trophy. And then the Corinthians, irritated by the reproaches of the aged men in the city, after about twelve days' preparation came out again, and, claiming the victory, raised another trophy. Hereupon the Athenians sallied out of Megara, killed those who were erecting the trophy, and charged and defeated the rest of the army.