Judging of the unknown from the known, the Greeks might reasonably conclude that in all parts of the Empire similar defections had occurred, and that thus both the dimensions and the resources of the state had suffered serious diminution, and fell far below the conception which they had been accustomed to form of them.
The immediate consequence of the Cyreian expedition was a rupture between Persia and Sparta.

Sparta had given aid to Cyrus, and thus provoked the hostility of the Great King.

She was not inclined to apologize or to recede.

On the contrary, she saw in the circumstances of the expedition strong grounds for anticipating great advantages to herself from a war with so weak an antagonist.

Having, therefore, secured the services of the returned Ten Thousand, she undertook the protection of the Asiatic Greeks against Persia, and carried on a war upon the continent against the satraps of Lydia and Phrygia for the space of six years (B.C.399 to B.C.