History of the Peloponnesian War

After this, the Peloponnesians, desiring to aid the Aeginetae, sent over into Aegina itself three hundred men of arms of the same that had before aided the Corinthians and Epidaurians and with other forces seized on the top of Geraneia. And the Corinthians and their confederates came down from thence into the territory of Megara, supposing that the Athenians, having much of their army absent in Aegina and in Egypt, would be unable to aid the Megareans or, if they did, would be forced to rise from before Aegina.

But the Athenians stirred not from Aegina; but those that remained at Athens, both young and old, under the conduct of Myronides went to Megara;

and after they had fought with doubtful victory, they parted asunder again with an opinion on both sides not to have had the worse in the action.

And the Athenians, who notwithstanding had rather the better, when the Corinthians were gone away erected a trophy. But the Corinthians, having been reviled at their return by the ancient men of the city, about twelve days after came again prepared and set up their trophy likewise, as if the victory had been theirs. Hereupon the Athenians sallying out of Megara with a huge shout both slew those that were setting up the trophy and, charging the rest, got the victory.