Achaean League Authority in Federation from 5th Century BC to 146 BC.
The Achaean League 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.
Achaean League
/Files/Images/Coinsite/CoinDB/Dyme(0).jpg
An AR Hemidrachm struck c. 86 BC in Dyme
Obverse: head of laureate Zeus right

Reverse: fish under (AX) monogram all within wreath; (APT) left / ΔY up

Diameter: -
Die Orientation: -
Weight: 2.2 g
ex Forum Ancient Coins
Clerk 55; BCD Peloponnesos 482
/Files/Images/Coinsite/CoinDB/Megalopolis.jpg
An AR Hemidrachm struck 160-146 BC in Megalopolis
Obverse: laureate head of Zeus right

Reverse: (AX) monogram, thunderbolt below, all within wreath; ΞB / K_A / M

Diameter: -
Die Orientation: -
Weight: 2.4 g
No notes for this coin
Benner 17; BCD Peloponnesos 1551.1; HGC 5, 953
/Files/Images/Coinsite/CoinDB/Antigoneia_Mantinea.jpg
An AR Hemidrachm struck c. 188-180 BC in Mantineia
Obverse: laureate head of Zeus right

Reverse: (AX) monogram within wreath; A_N / CΩ

Diameter: -
Die Orientation: -
Weight: 2.4 g
Mantinea as Antigoneia
Benner 5; BCD Peloponnesos 1492.2; HGC 5, 926
/Files/Images/Coinsite/CoinDB/Megara.jpg
An AR Hemidrachm struck c. 175-168 BC in Megara
Obverse: laureate head of Zeus Amarios right

Reverse: lyre above (AX) monogram, all within wreath; ΔΩ_PO

Diameter: -
Die Orientation: -
Weight: 2.2 g
No notes for this coin
BCD Peloponessos 27.1; McClean 6431-2, Benner S. 78, 4; HGC 4, 1805
/Files/Images/Coinsite/CoinDB/1322_Pallantion.jpg
An AR Hemidrachm struck 100-80 BC in Pallantion
Obverse: laureate head of Zeus right

Reverse: (AX) monogram, trident below, all within wreath; A / Π_Λ / (YE)

Diameter: -
Die Orientation: -
Weight: 2 g
No notes for this coin
BCD Peloponnesos 1593.2; Benner 4; HGC 5, 969