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Achean League

League of the Achaeans
Κοινὸν τῶν Ἀχαιῶν
Koinon ton Achaion
280 BC–146 BC
Achaean League in 150 BC
Capital Aigion (meeting place)
Languages Achaean Doric Koine, Koine Greek
Religion Ancient Greek religion
Government Republican Confederacy
Strategos List of Strategoi
Legislature Achaean assembly
Historical era Classical Antiquity
 •  Re-founded 280 BC
 •  Conquered by the Roman Republic in the Achaean War 146 BC
Currency Drachma
Preceded by
Succeeded by
League of Corinth
Achaea (Roman province)
Today part of  Greece

The Achaean League (Greek: Κοινὸν τῶν Ἀχαιῶν, Koinòn tou Ákhaion - "League of Achaea) was a Hellenistic-era confederation of Greek city states on the northern and central Peloponnese. The league was named after the region of Achaea in the northwestern Peloponnese, which formed its original core. The first league was formed in the fifth century BC. The second Achaean League was established in 280 BC. As a rival of Antigonid Macedon and an ally of Rome, the league played a major role in the expansion of the Roman Republic into Greece. This process eventually led to the League's conquest and dissolution by the Romans in 146 BC.

The League represents the most successful attempt by the Greek city states to develop a form of federalism, which balanced the need for collective action with the desire for local autonomy. Through the writings of the Achaean statesman Polybius, this structure has had an influence on the constitution of the United States and other modern federal states.

The first Achaean League became active in the fifth century in the northwestern Peloponnese. After the catastrophic destruction of the ancient capital Helike by an earthquake and tsunami in 373 BC, it appears to have lapsed sometime in the fourth century.

The regional Achaean League was reformed in 281/0 BC by the communities of Dyme, Patrae, Pharae and Tritaea, joined in 275 by Aegium, which controlled the important sanctuary of Zeus Homarios. The league grew quickly to include the entire Achaean heartland, and after a decade it had ten or eleven members. The key moment for the League's transformation into a major power came in 251, when Aratus, the exiled son of a former magistrate of Sicyon, overthrew the tyranny in his native city and brought it into the Achaean League. Since the Sicyonians were of Dorian and Ionian origin, their inclusion opened the League for other national elements. Aratus, then only twenty years old, rapidly grew to become the leading politician of the League. In the thirty two years between 245 and his death in 213, Aratus would hold the office of general a total of sixteen times.


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