Battle of the Teutoburg Forest
The Battle of the Teutoburg Forest (German: Schlacht im Teutoburger Wald, Hermannsschlacht or Varusschlacht), described as clades Variana (the Varian disaster) by Roman historians, took place in the Teutoburg Forest in 9 CE, when an alliance of Germanic tribes ambushed and decisively destroyed three Roman legions and their auxiliaries, led by Publius Quinctilius Varus. The anti-Roman alliance was led by Arminius, who had acquired Roman citizenship and received a Roman military education, thus enabling him to personally deceive the Roman commander and foresee the Roman army's tactical responses.Despite several successful campaigns and raids by the Roman army in the years after the battle, they never again attempted to conquer Germanian territory east of the Rhine River. The Germanic victory against the Roman legions in the Teutoburg forest had far-reaching effects on the subsequent history of both the ancient Germanic peoples and on the Roman Empire. Modern historians have regarded Arminius' victory as ""Rome's greatest defeat"" and one of the most decisive battles in history.