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.

Being of opinion then that the tyrant state which has set itself up in Greece, has set itself up against all alike, so that it already rules over some, and is designing to rule over others, let us go against it and reduce it; and live ourselves free from danger in future, and give freedom to the Greeks who are now enslaved.
To this effect spoke the Corinthians.

The Lacedaemonians, after they had heard from all what they thought, put the question to the vote of all the allies who were present in succession, both to greater and smaller states alike: and the majority voted for war.

But though they had resolved on it, it was impossible to take it in hand immediately, as they were unprepared; but it was determined that suitable means should be provided by the several states, and that there should be no delay. A year, however, did not pass while they were settling all that was necessary, but less, before they invaded Attica, and openly proceeded to the war.