What is "argolis"

Argolis or the Argolid ( Argolída, ; Argolís in ancient Greek and Katharevousa) is one of the regional units of Greece. It is part of the region of Peloponnese, situated in the eastern part of the Peloponnese peninsula and part of the tripoint area of Argolis, Arcadia and Corinthia. Much of the territory of this region is situation in the Argolid Peninsula.