The Etruscans, Samnites, and Umbrians crossed the Apennine Mountains and approached Sentinum. Their plan was for the Samnites and Senones to engage the Romans and for the Etruscans and Umbrians to take the Roman camp during the battle. Deserters from Clusium informed Quintus Fabius about this plan. The consul ordered the legions in Falerii and the Vatican to march to Clusium and ravage its territory as another diversionary strategy. This succeeded in drawing the Etruscans away from Sentinum to defend their land. Livy thought that with their departure the two enemy forces were so evenly matched that if the Etruscans and Umbrians had been present it would have been a disaster for the Romans. The propraetor Gnaeus Fulvius defeated the Etruscans. Perusia and Clusium lost up to 3,000 men.