In the south the Lucanians also rose against Rome. The extension of the Roman dominion in the south of the peninsula had brought the state into connection with the Greek cities, which at one period were so numerous and powerful as to give to this part of Italy the name of Magna Graecia.[25] Many of these cities had now fallen into decay through internal dissensions and the conquests of the Lucanians and other Sabellian tribes; but Tarentum, originally a Lacedaemonian colony, still maintained her former power and splendor. The Tarentines naturally regarded with extreme jealousy the progress of the Roman arms in the south of Italy, and had secretly instigated the Etruscans and Lucanians to form a new coalition against Rome. But the immediate cause of the war between the Lucanians and Romans was the assistance which the latter had rendered to the Greek city of Thurii. Being attacked by the Lucanians, the Thurians applied to Rome for aid, and the Consul C. Fabricius not only relieved Thurii, but defeated the Lucanians and their allies in several engagements (B.C. 252). Upon the departure of Fabricius a Roman garrison was left in Thurii. The only mode now of maintaining communication between Rome and Thurii was by sea; but this was virtually forbidden by a treaty which the Romans had made with Tarentum nearly twenty years before, in which treaty it was stipulated that no Roman ships of war should pass the Lacinian promontory. But circumstances were now changed, and the Senate determined that their vessels should no longer be debarred from the Gulf of Tarentum. There was a small squadron of ten ships in those seas under the command of L. Valerius; and one day, when the Tarentines were assembled in the theatre, which looked over the sea, they saw the Roman squadron sailing toward their harbor. This open violation of the treaty seemed a premeditated insult, and a demagogue urged the people to take summary vengeance. They rushed down to the harbor, quickly manned some ships, and gained an easy victory over the small Roman squadron. Only half made their escape, four were sunk, one taken, and Valerius himself killed. After this the Tarentines marched against Thurii, compelled the inhabitants to dismiss the Roman garrison, and then plundered the town.