History of the Peloponnesian War

Meanwhile the Athenians marched against them with their whole levy and a thousand Argives and the respective contingents of the rest of their allies. Altogether they were fourteen thousand strong.

The march was prompted by the notion that the Lacedaemonians were at a loss how to effect their passage, and also by suspicions of an attempt to overthrow the democracy.

Some cavalry also joined the Athenians from their Thessalian allies; but these went over to the Lacedaemonians during the battle.

The battle was fought at Tanagra in Boeotia. After heavy loss on both sides victory declared for the Lacedaemonians and their allies.