Roman army of the mid-Republic placed unprecedented strains on Roman manpower, not least on the Order of Knights and the First Class of commoners which provided the cavalry. During Hannibal's apocalyptic march through Italy (218–216 BC), thousands of Roman cavalrymen were killed in the field. The losses were especially serious for the equestrian order, which also provided the army's senior officers. Livy relates how, after Cannae, gold rings (a badge of knightly rank), recovered from the corpses of Roman knights formed a pile one "modius" (about 9 litres) large. In the succeeding years 214–203 BC, the Romans kept at least 21 legions in the field
Campaign history of the Roman military was the costliest Rome had suffered since the Battle of Cannae. After the Cimbri inadvertently granted the Romans a reprieve by diverting to plunder Iberia, Rome was given the opportunity to carefully prepare for and successfully meet the Cimbri and Teutons in the Battle of Aquae Sextiae (102 BC) and the Battle of Vercellae (101 BC) where both tribes were virtually annihilated, ending the threat. The extensive campaigning abroad by Rome, and the rewarding of soldiers with plunder from those campaigns, led to the trend of soldiers becoming increasingly loyal to their commanders rather than to the state, and a