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The Histri are classified in some sources as a "Venetic" tribe, with some ties with Illyrians. The Romans described the Histri as a fierce tribe of pirates, protected by the difficult navigation of their rocky coasts. It took two military campaigns for the Romans to finally subdue them in 177 BCE. The region was then called together with the Venetian part the X. Roman Region of "Venetia et Histria", the ancient definition of the northeastern border of Italy. Dante Alighieri refers to it as well, the eastern border of Italy per ancient definition is the river Arsia.
- Wilkes, J. J. The Illyrians, 1992,ISBN 0-631-19807-5,page 183,"... We may begin with the Venetic peoples, Veneti, Carni, Histri and Liburni, whose language set them apart from the rest of the Illyrians...."