This proved a difficult task, as the tribes were strongly independent and many were traditionally enemies of each other. Between AD 6 and 9, the Romans were forced to move eight of the eleven legions present in Germania east of the Rhine to crush a rebellion in the Balkans, leaving Varus with only three legions to face the Germans. An additional two legions, under the command of Lucius Nonius Asprenas, were stationed in Moguntiacum. Arminius saw this as the perfect opportunity to defeat Varus. In the autumn of AD 9, the 25-year-old Arminius brought to Varus a false report of rebellion in northern Germany. He persuaded Varus to divert the three legions under his command (composed of the 17th, 18th, and 19th legions, plus three cavalry detachments and six cohorts of auxiliaries), which were at the time marching to winter quarters, to suppress the rebellion. Varus and his legions marched right into the trap that Arminius had set for them near Kalkriese. Arminius' tribe, the Cherusci, and their allies the Marsi, Chatti, Bructeri, Chauci, and Sicambri (five out of at least fifty Germanic tribes at the time) ambushed and annihilated Varus' entire army, totaling over 20,000 men, as it marched along a narrow road through a dense forest. Recent archaeological finds show the long-debated location of the three-day battle was almost certainly near Kalkriese Hill, about 20 km north of present-day Osnabrück. When defeat was certain, Varus committed suicide by falling on his sword. The battle was one of the most devastating defeats Rome suffered in its history. Arminius' success in destroying three entire legions and driving the Romans out of Germany marked a high point of Germanic power for centuries. Roman attempts to reconquer Germania failed, although they did eventually manage to break Arminius' carefully coordinated alliance. After the battle, the Germans quickly annihilated every trace of Roman presence east of the Rhine. Roman settlements such as the Waldgirmes Forum were abandoned. The vastly outnumbered Roman garrison of Aliso (present-day Haltern am See), under the command of the prefect Lucius Cedicius, inflicted heavy losses on the Germans before retreating into Gaul, resisting long enough for Lucius Nonius Asprenas to organize the Roman defense on the Rhine and Tiberius to arrive with a new army.