The Battle of the Teutoberg Forest in 9 AD was one of Rome's worst ever defeats. Just a few years either side of the death of Christ, the Romans had been subjugating many of the Germanic tribes just east of the Rhine – some by treaty, some by force.

But the Germans resented the encroachment and the will to resist was building.

All they needed was an opportunity to fight back. And soon, there was someone willing to give them one by betraying Roman trust.

In the year 9 AD, three Roman legions would be lured to the Teutoberg Forest, and the result would lead to the Emperor Augustus butting his head against a wall screaming.

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