Achæus, one of the sons of Xuthus, having committed an accidental murder, fled to Lacedæmon, and occasioned the inhabitants to take the name of Achæans.[235] Ion, the other son, having vanquished the Thracian army with their leader Eumolpus, obtained so much renown, that the Athenians intrusted him with the government of their state. It was he who first distributed the mass of the people into four tribes, and these again into four classes according to their occupations, husbandmen, artificers, priests, and the fourth, military guards; after having made many more regulations of this kind, he left to the country his own name. It [CAS. 383] happened at that time that the country had such an abundance of inhabitants, that the Athenians sent out a colony of Ionians to Peloponnesus, and the tract of country which they occupied was called Ionia after their own name, instead of Ægialeia, and the inhabitants Ionians instead of Ægialeans, who were distributed among twelve cities. After the return of the Heracleidæ, these Ionians, being expelled by the Achæans, returned to Athens, whence, in conjunction with the Codridæ, (descendants of Codrus,) they sent out the Ionian colonists to Asia.[236] They founded twelve cities on the sea-coast of Caria and Lydia, having distributed themselves over the country into as many parts as they occupied in Peloponnesus.[237] The Achæans were Phthiotæ by descent, and were settled at Lacedæmon, but when the Heracleidæ became masters of the country, having recovered their power under Tisamenus, the son of Orestes, they attacked the Ionians, as I said before, and defeated them. They drove the Ionians out of the country, and took possession of the territory, but retained the same partition of it which they found existing there. They became so powerful, that, although the Heracleidæ, from whom they had revolted, occupied the rest of Peloponnesus, yet they defended themselves against them all, and called their own country Achæa. From Tisamenus to Ogyges they continued to be governed by kings. Afterwards they established a democracy, and acquired so great renown for their political wisdom, that the Italian Greeks, after their dissensions with the Pythagoreans, adopted most of the laws and institutions of the Achæans. After the battle of Leuctra the Thebans[238] committed the disputes of the cities among each other to the arbitration of the Achæans. At a later period their community was dissolved by the Macedonians, but they recovered by degrees their former power. At the time of the expedition of Pyrrhus into Italy they began with the union of four cities, among which were Patræ and Dyme.[239] They then had an accession of the twelve cities, with the exception of Olenus and Helice; the former refused to join the league; the other was swallowed up by the waves.