As every victory won by the Athenians had only made Sparta more jealous, the war was renewed, and carried on with great fury on both sides. The Spartans gained the first victories; but, owing to their better navy, the Athenians soon won over all the neighboring cities, and got the upper hand of their foes.

They were about to end the war by a last victory at Coronea, when fortune suddenly deserted them, and they were so sorely beaten that they were very glad to agree to a truce and return home. By the treaty then signed, the Athenians bound themselves to keep the peace during a term of thirty years. In exchange, the Spartans allowed them to retain the cities which they had conquered, and the leadership of one of the confederacies formed by the Greek states, reserving the head of the other for themselves.