Simultaneously, and in concert with the Spartan, the Boeotians forcibly took possession of Oenoe and Hysix--two towns on the extremity of Attica while from Chalcis (the principal city of the Isle of Euboea which fronted the Attic coast) a formidable band ravaged the Athenian territories.

Threatened by this threefold invasion, the measures of the Athenians were prompt and vigorous.

They left for the present unavenged the incursions of the Boeotians and Chalcidians, and marched with all the force they could collect against Cleomenes at Eleusis.

The two armies were prepared for battle, when a sudden revolution in the Spartan camp delivered the Athenians from the most powerful of their foes.

The Corinthians, insnared by Cleomenes into measures, of the object of which they had first been ignorant, abruptly retired from the field.