Appian wrote that Calpurnius Piso was sent as a commander to Hispania because there were revolts. The following year, Servius Galba was sent without soldiers because the Romans were busy with Cimbrian War and a slave rebellion in Sicily (the [Third Servile War], 104–100 BC). In the former war the Germanic tribes of the Cimbri and the Teutones migrated around Europe and invaded territories of allies of Rome, particularly in southern France, and routed the Romans in several battles until their final defeat. In 105 BC, some of them also made a foray in northern Hispania and then returned to Gaul. Appian wrote that the Romans sent governors who would settle affairs in Hispania without war as much as they could. This decrease in the military presence and possibly the mentioned foray into northern Hispania might have encouraged significant rebellions.
