Strabo mentions a tradition that Ravenna was founded by Thessalians, who afterwards, finding themselves pressed by the Etrurians, called in their Umbrian neighbours and eventually departed, leaving the city to their allies.
Throughout the valley of the Po the Gauls took the place of the Etrurians as a conquering power; but Ravenna may possibly have retained its Umbrian character until, about the year 191 B.C., by the conquest of the Boii, the whole of this region passed definitely under the dominion of Rome.
At some period unknown, prior to the 6th century, the Etrurians became a conquering people and extended their power not only northwards over, probably, Mantua, Felsina, Melpum and perhaps Hadria and Ravenna (Etruria Circumpadana), but also southwards into Latium and Campania.
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