Gnæus Pompeius brought the Marsians, the Marrucini, and the Vestini under subjection. Gaius Cosconius, another Roman prætor, advanced against and burned Salapia. He received the surrender of Cannæ and laid siege to Canusium. He had a severe fight with the Samnites, who came to its relief. After great slaughter on both sides Cosconius was beaten and retreated to Cannæ. A river separated the two armies, and Trebatius sent word to Cosconius either to come over to his side and fight him, or to withdraw and let him cross. Cosconius withdrew, and while Trebatius was crossing attacked him and got the better of him, and, while he was flying toward the stream, killed 15,000 of his men. The remainder took refuge with Trebatius in Canusium. Cosconius overran the territory of Larinum, Venusia, and Asculum, and invaded that of the Pœdiculi, and within two days received their surrender.