Naxos

During the 8th and 7th centuries BC, Naxos dominated commerce in the Cyclades. Naxos was the first Greek city-state to attempt to leave the Delian League circa 476 BC; Athens quickly squashed the notion and forcibly removed all military naval vessels from the island's control. Athens then demanded all future payments from Naxos in the form of gold rather than military aid.

• http://en.wikipedia.org/wiki/Naxos