History of the Peloponnesian War

At all events they resolved to attempt it. Digging through the party walls of the houses, they thus managed to join each other without being seen going through the streets, in which they placed wagons without the beasts in them, to serve as a barricade, and arranged everything else as seemed convenient for the occasion.

When everything had been done that circumstances permitted, they watched their opportunity and went out of their houses against the enemy. It was still night, though daybreak was at hand: in daylight it was thought that their attack would be met by men full of courage and on equal terms with their assailants, while in darkness it would fall upon panic-stricken troops, who would also be at a disadvantage from their enemy's knowledge of the locality. So they made their assault at once, and came to close quarters as quickly as they could.

The Thebans, finding themselves outwitted, immediately closed up to repel all attacks made upon them.