Though the slaves lacked military training, they displayed a skillful use of available local materials and unusual tactics when facing the disciplined Roman armies. They spent the winter of 73–72 BC training, arming and equipping their new recruits, and expanding their raiding territory to include the towns of Nola, Nuceria, Thurii and Metapontum. The distance between these locations and the subsequent events indicate that the slaves operated in two groups commanded by the remaining leaders Spartacus and Crixus.
In spring of 72 BC, the slaves left their winter encampments and began to move northwards. At the same time, the Roman Senate, alarmed by the defeat of the praetorian forces, dispatched a pair of consular legions under the command of Lucius Gellius Publicola and Gnaeus Cornelius Lentulus Clodianus. The two legions were initially successful—defeating a group of 30,000 slaves commanded by Crixus near Mount Garganus but then were defeated by Spartacus. These defeats are depicted in divergent ways by the two most comprehensive (extant) histories of the war by Appian and