History of the Peloponnesian War

Thucydides

Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.

But the Athenians sallied out against them with all their citizens, and a thousand Argives, and the several contingents of the other allies. amounting in all to fourteen thousand.

They marched against them because they thought they were at a loss how to effect a passage, and in some measure also from a suspicion of the democracy being put down.