History of the Peloponnesian War

At this time was that cart at the gates, which were opened according to custom as for the boat. And the Athenians seeing it (for so it was agreed on), arose from their ambush and ran with all speed to get in before the gates should be shut again, and to be there whilst the cart was yet in the gates and kept them open.

And first those Plataeans and peripoli that were with Demosthenes ran in, in that same place where the trophy is now extant, and fighting presently within the gates (for those Peloponnesians that were nearest heard the stir), the Plataeans overcame those that resisted and made good the gates for the Athenian men of arms that were coming after.

After this the Athenian soldiers, as they entered, went up every one to the wall.

And a few of the Peloponnesians that were of the garrison, made head at first and fought and were some of them slain; but the most of them took their heels, fearing in the night both the enemy that charged them and also the traitors of the Megareans that fought against them, apprehending that all the Megareans in general had betrayed them.