History of the Peloponnesian War

Neither rescind your resolution to sail to Sicily, on the ground that you would be going to attack a great power. The cities in Sicily are peopled by motley rabbles, and easily change their institutions and adopt new ones in their stead;

and consequently the inhabitants, being without any feeling of patriotism, are not provided with arms for their persons, and have not regularly established themselves on the land; every man thinks that either by fair words or by party strife he can obtain something at the public expense, and then in the event of a catastrophe settle in some other country, and makes his preparations accordingly.

From a mob like this you need not look for either unanimity in counsel or concert in action; but they will probably one by one come in as they get a fair offer, especially if they are torn by civil strife as we are told.

Moreover, the Siceliots have not so many heavy infantry as they boast; just as the Hellenes generally did not prove so numerous as each state reckoned itself, but Hellas greatly over-estimated their numbers, and has hardly had an adequate force of heavy infantry throughout this war.