HEGEMONY OF SPARTA.--Having thus organized the body politic, Sparta took the steps which gave it the _hegemony_ in Peloponnesus and over all Greece. First, it conquered the neighboring state of _Messenia_ in two great wars, the first ending about 725 B.C., and the second about 650 B.C. In the first of these wars, the Messenians submitted to become tributary to Sparta, after their citadel, _Ithome_, had been captured, and their defeated hero, _Aristodemus_, had slain himself. Many of the vanquished Messenians escaped from their country to Arcadia and Argolis. Some of them fled farther, and founded _Rhegium_ in Lower Italy. In the second war, the Messenians revolted against the tyrannical rule of Sparta, and at first, under _Aristomenes_, were successful, but were afterwards defeated by the Spartans, who were inspirited for the conflict by the war-songs of the Athenian poet, _Tyrtaeus_. _Aristomenes_ fled to Rhodes. Most of his people were made helots. The _Arcadians_, after long resistance, succumbed, and came under the Spartan hegemony (about 600 B.C.). _Argos_, too, was obliged to renounce its claim to this position in favor of its Spartan antagonist, after its defeat by _Cleomenes_, the Lacedaemonian king, at Thyrea (549 B.C.). The _Argive League_ was dissolved, and Sparta gained the right to command in every war that should be waged in common by the Peloponnesian states, the right, also, to determine the contingent of troops which each should furnish, and to preside in the council of the confederacy. She now began to spread her power beyond Peloponnesus, entered into negotiations with _Lydia_ (555 B.C.), and actually sent an expedition to the coast of Asia (525 B.C.). Moreover as early as 510 B.C., by interfering in the affairs of the states north of the Corinthian isthmus, and with _Attica_ in particular, she sowed among the Athenians the seeds of a lasting enmity.