History of the Peloponnesian War

The next day the Athenians, sailing about unto that part of the city which is towards Scione, seized on the suburbs, and all that day wasted their fields, no man coming forth to oppose them (for there was also sedition in the city); and the three hundred Scionaeans the night following went home again.

The next day Nicias, with the one half of the army, marched to the confines and wasted the territory of the Scionaeans; and Nicostratus at the same time, with the other half, sat down against the city before the higher gates towards Potidaea.

Polydamidas (for it fell out that the Mendaeans and their aids had their arms lying within the wall in this part) set his men in order for the battle and encouraged the Mendaeans to make a sally.

But when one of the faction of the commons in sedition said, to the contrary, that they would not go out and that it was not necessary to fight, and was upon this contradiction by Polydamidas pulled and molested, the commons in passion presently took up their arms and made towards the Peloponnesians and such other with them as were of the contrary faction;

and falling upon them put them to flight, partly with the suddenness of the charge and partly through the fear they were in of the Athenians, to whom the gates were at the same time opened. For they imagined that this insurrection was by some appointment made between them.