Its variants were spoken in the southern and eastern Peloponnese as well as in Sicily, Epirus, Macedonia, Southern Italy, Crete, Rhodes, some islands in the southern Aegean Sea and some cities on the south east coast of Anatolia. Together with Northwest Greek, it forms the "Western group" of classical Greek dialects. By Hellenistic times, under the Achaean League, an Achaean-Doric koiné language appeared, exhibiting many peculiarities common to all Doric dialects, which delayed the spread of the Attic-based Koine Greek to the Peloponnese until the 2nd century BC.[2]