The Romans learned from the disaster and never again tried to conquer the Germans beyond the Rhine ...
You might want to check that. Read what happened after the death of Augustus. As a result of later Roman invasions of Germania, for example, Hermann's wife Thusnelda was captured and taken to Rome as a prisoner.
At least, that was the official line.
There are, I think, additional analogies residing in there somewhere. I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.
The battle began a seven-year war which established the Rhine as the boundary of the Roman Empire for the next four hundred years, until the decline of the Roman influence in the West. The Roman Empire made no further concerted attempts to conquer Germania beyond the Rhine. http://en.wikipedia.org/wiki/Battle_of_the_Teutoburg_Forest
The battle began a seven-year war which established the Rhine as the boundary of the Roman Empire for the next four hundred years, until the decline of the Roman influence in the West. The Roman Empire made no further concerted attempts to conquer Germania beyond the Rhine.
http://en.wikipedia.org/wiki/Battle_of_the_Teutoburg_Forest
History, as usual, is a bit more complicated, though the general point seems valid:
In spite of doubts on the part of his uncle, Emperor Tiberius, Germanicus managed to raise another huge army and invaded Germania again the next year, in 16 AD. ... One final battle was fought at the Angivarian Wall west of modern Hanover, repeating the pattern of high German fatalities forcing them to flee. ... After a few more raids across the Rhine, which resulted in the recovery of two of the three legion's eagles lost in 9, Germanicus was recalled to Rome and informed by Tiberius that he would be given a triumph and reassigned to a different command.[2] [3] ... Despite the successes enjoyed by his troops, Germanicus' German campaign was in reaction to the mutinous intentions of his troops, and lacked any strategic value. In addition he engaged the very German leader (Arminius) who had destroyed three Roman legions in AD 9, and exposed his troops to the remains of those dead Romans. Furthermore, in leading his troops across the Rhine, without recourse to Tiberius, he flouted the instructions of Augustus to keep that river as the boundary of the empire, and opened himself to doubts about his motives in such independent action. These errors in strategic and political judgement gave Tiberius reason enough to recall his nephew.[1]
In spite of doubts on the part of his uncle, Emperor Tiberius, Germanicus managed to raise another huge army and invaded Germania again the next year, in 16 AD. ... One final battle was fought at the Angivarian Wall west of modern Hanover, repeating the pattern of high German fatalities forcing them to flee. ... After a few more raids across the Rhine, which resulted in the recovery of two of the three legion's eagles lost in 9, Germanicus was recalled to Rome and informed by Tiberius that he would be given a triumph and reassigned to a different command.[2] [3]
...
Despite the successes enjoyed by his troops, Germanicus' German campaign was in reaction to the mutinous intentions of his troops, and lacked any strategic value. In addition he engaged the very German leader (Arminius) who had destroyed three Roman legions in AD 9, and exposed his troops to the remains of those dead Romans. Furthermore, in leading his troops across the Rhine, without recourse to Tiberius, he flouted the instructions of Augustus to keep that river as the boundary of the empire, and opened himself to doubts about his motives in such independent action. These errors in strategic and political judgement gave Tiberius reason enough to recall his nephew.[1]