History of the Peloponnesian War

Thucydides

Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.

And our aim in the recital of the facts will be, not so much to deprecate censure, as to show by evidence with what sort of city you will be involved in war if you are not well advised.

"For we affirm that at Marathon we alone bore the first brunt of the Barbarian's attack, and that when he came again, not being able to defend ourselves by land, we embarked in a body on our ships and joined in the sea-fight at Salamis. This prevented his sailing against you city by city and ravaging the Peloponnesus, for you would have been unable to aid one another against a fleet so numerous.