Peloponnesus (lit. the Isle of Pelops), the ancient name of the Morea of Greece, the chief cities of which were Corinth, Argos, and Sparta; it was connected with the rest of Greece by the Isthmus of Corinth.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Peloponnesian War * Pelops