The Achaeans (; Akhaioí) constitute one of the collective names for the Greeks in Homer's Iliad (used 598 times) and Odyssey. The other common names are Danaans (; Danaoi; used 138 times in the Iliad) and Argives (; ; used 182 times in the Iliad) while Panhellenes ( Panhellenes) and Hellenes (; Hellenes) both appear only once; all of the aforementioned terms were used synonymously to denote a common Greek civilizational identity. In the historical period, the Achaeans were the inhabitants of the region of Achaea, a region in the north-central part of the Peloponnese. The city-states of this region later formed a confederation known as the Achaean League, which was influential during the 3rd and 2nd centuries BC.