Achaean League (əkē`ən), confederation of cities on the Gulf of Corinth. The First Achaean League, about which little is known, was formed presumably before the 5th cent. B.C. and lasted through the 4th cent. B.C. Its purpose was mutual protection against pirates. The Achaeans remained aloof from the wars in Greece until they joined the opposition to Philip II of Macedon in 338 B.C. The confederation was dissolved soon after. The Second Achaean League was founded in 280 B.C. Sicyon was freed from the rule of its tyrant in 251 B.C., and it soon joined the confederation under the leadership of Aratus Aratus, d. 213 B.C., Greek statesman and general of Sicyon, prime mover and principal leader of the Second Achaean League . His objective at first was to free the Peloponnesus from Macedonian domination, and he is credited with bringing into the confederation many of
..... Click the link for more information. . Other cities outside Achaea were incorporated on terms of equality, and in 247 B.C. the Macedonians were driven from Corinth. There was some promise of liberating all Greece, but unfortunately the interference of Cleomenes III Cleomenes III, c.260–219 B.C., king of Sparta (235–221 B.C.). He was probably the most energetic king Sparta ever had, a conscious imitator of Agis III (see under Agis ). In his determined effort to restore the prestige of the city, he began (227 B.C.
..... Click the link for more information. of Sparta threatened the Achaean League, and in 227 B.C. he began a war. The Achaean League then requested (224 B.C.) Macedonian aid against Sparta and the Aetolian League. The result was the eclipse of the confederation until the wars between Macedon and Rome. In 198 B.C. the Achaeans went over to Rome and with Roman aid won practically the whole Peloponnesus, forcing Sparta and Messene to join. Later suspecting the Achaeans of again looking toward Macedon, the Romans deported (168 B.C.) their leaders (including Polybius Polybius (pōlĭ`bēəs), 203? B.C.–c.120 B.C., Greek historian, b. Megalopolis.
..... Click the link for more information. ) to Italy. In 146 B.C. the Romans waged a war against the Achaeans and easily triumphed at Corinth. The Romans dissolved the confederation, thereby ending Greek liberty.

Achaean League

3rd-century BC confederation of towns of Achaea, an area in the northern Peloponnese of ancient Greece. Twelve cities had joined together by the 4th century BC to combat piracy, but they disbanded after the death of Alexander the Great. Ten cities renewed the league in 280 BC, later admitting non-Achaean cities to defend themselves against Macedonia, then Sparta, and finally Rome. Rome dissolved the league after defeating it in 146 BC. Later a smaller league was formed that existed into the Roman imperial age.

Achaean League

federation of Greek cities formed in 280 B.C. to resist Macedonian domination. [Gk. Hist.: Brewer Dictionary, 6]

See : Cooperation