Opis was an Iapygian king of the Messapian state. Opis reigned during the first half of the 5th century BC and participated in the Iapygian-Tarentine wars. A decade after the catastrophic defeat of Taras at Kailia in 473 BC, the Tarentines were set for battle, this time perhaps on their own terms near the Iapygian city of Hyria. In 460 BC the Tarentines, apparently confident enough in their own numbers to match up against an Iapygian force alone, were opposed by a much smaller enemy than the massive army brought against Taras thirteen years earlier. Opis had come to aid the Peucetii in the battle but this time the colonial Greek hoplites, backed again by a formidable cavalry arm, proved superior to the Iapygians. In the decisive battle Opis himself was killed. This battle was a fairly even