Tetrobol

The Chalkidian League was a federal state formed by Greek cities of the Chalcidice peninsula, initially crystallizing around Olynthos as its dominant polis following the Macedonian threat of the late fifth century. The League's coinage was a deliberate assertion of collective political identity at a moment when most member cities had previously struck independently. It was dissolved by Sparta under the terms imposed after the King's Peace of 386 BC — then reconstituted — before Philip II finally destroyed Olynthos outright in 348 BC and absorbed the region into Macedon, ending the series permanently.