The
Batavi were a sub-tribe of the Germanic
Chatti tribal group who had migrated to the region between the
Old Rhine and
Waal rivers (still today called the
Betuwe after them) in what became the Roman province of Germania Inferior (S Netherlands/Nordrhein). Their land, in spite of potentially fertile alluvial deposits, was largely uncultivable, consisting mainly of Rhine delta swamps. Thus the Batavi population it could support was tiny: not more than 35,000 at this time. However in the century after the Roman conquest of neighbouring
Gaul trade had flourished with Roman, Gaulish and Germanic material culture being found together in the region. They were a warlike people, skilled horsemen, boatmen and swimmers. They were therefore excellent soldier-material. In return for the unusual privilege of exemption from
tributum (direct taxes on land and heads that most
peregrini were subject to), they supplied a disproportionate number of recruits to the Julio-Claudian auxilia, particularly in the
cavalry: one
ala and eight
cohortes. They also provided most of the emperor
Augustus' elite regiment of
Germanic bodyguards (
Germani corpore custodes), which continued in existence until AD 68. The Batavi auxilia amounted to about 5,000 men, implying that for the entire
Julio-Claudian period, over 50% of all Batavi males reaching military age (16 years) may have enlisted in the auxilia. Thus, the Batavi, although just about 0.05% of the total population of the empire in AD 23, supplied about 4% of the total auxilia, i.e. 80 times their proportionate share. They were regarded by the Romans as the best and bravest (
fortissimi,
validissimi) of their auxiliary, and indeed of all their forces. In Roman service, they had perfected a unique technique for swimming across rivers wearing full armour and weapons.
Gaius Julius Civilis (not his given name) was a hereditary prince of the Batavi and the prefect (commanding officer) of a Batavi cohort. A veteran of 25 years' distinguished service in the Roman army, he and the eight Batavi cohorts had played an important role in the
Roman invasion of Britain in AD 43 and the subsequent subjugation of that country (43–66). '' who organized the retreat of Roman troops from the Rhineland and was betrayed by his local auxiliaries. (Tac. Historiae IV.18). The medal was found on the
Kops Plateau in
Nijmegen. By 69, however, Civilis, the Batavi regiments and the Batavi people had become utterly disaffected from Rome. After the Batavi regiments were withdrawn from Britain in 66, Civilis and his brother (also a prefect) were arrested by the governor of Germania Inferior on false accusations of treason. The governor ordered the brother's execution, and sent Civilis to Rome in chains for judgement by the
Roman emperor Nero. (The difference in treatment indicates that the brother was still a
peregrinus, i.e. a non-citizen subject of the empire, while Civilis, as his name implies, had been accorded
Roman citizenship, which entitled him to have his case heard by the emperor in person). While Civilis was in prison awaiting trial, Nero was overthrown in AD 68 by an army led into Italy by the governor of
Hispania Tarraconensis, the veteran general
Galba. Nero committed suicide, ending the rule of the
Julio-Claudian dynasty, founded a century earlier by Augustus. Galba was proclaimed emperor. He acquitted Civilis of the treason charge and allowed him to return home. Back in Germania Inferior, however, it seems that Civilis was arrested again, this time on the order of the new governor
Aulus Vitellius, acting at the urging of the legions under his command, which demanded Civilis' execution. Meanwhile, Galba disbanded the German Bodyguards Regiment, which he distrusted due to the loyalty they had given to Nero in the latter's final days. This alienated several hundred crack Batavi troops, and indeed the whole Batavi nation, who considered it a grave insult. At the same time, relations collapsed between the eight Batavi cohorts and their parent-legion
XIV Gemina, to which they had been attached since the invasion of Britain 25 years earlier. The seething hatred between the Roman legionaries and their German auxiliaries erupted in serious fighting on at least two occasions. At this juncture, the Roman Empire was convulsed by its first major civil war for a century, the
Year of the Four Emperors. The cause was the fall of the Julio-Claudian dynasty. The descendants of Augustus had enjoyed the automatic and fervent loyalty of ordinary legionaries in the frontier armies, but Galba possessed no such legitimacy in their eyes. Supreme power was now open to whichever general was strong enough to seize it (and keep it). First, in AD 69, Galba's deputy,
Otho, carried out a
coup d'état in Rome against his leader. Amongst all the chaos, Galba was killed by the
Praetorian Guard under Otho's command. Then Vitellius launched his own bid for power and prepared to lead the Rhine legions into Italy against Otho. Now in urgent need of the Batavi's military support, Vitellius released Civilis. In return, the Batavi regiments helped Vitellius defeat Otho's forces at the
Battle of Bedriacum. The Batavi troops were then ordered to return home. But at this point news arrived of the mutiny of general
Titus Flavius Vespasianus, commander of forces in Syria, whose own massive army of five legions was soon joined by the legions on the
Danube. Vitellius' governor in Germania Inferior, desperate to raise more troops, lost the goodwill of the Batavi by attempting to conscript more Batavi than the maximum stipulated in their treaty. The brutality and corruption of the Roman recruiting centurions, who were also responsible for many cases of sexual assault on Batavi boys, brought already deep discontent in the Batavi homeland to the boil. == Uprising ==