The Teutoburg Forest (German: Teutobergwald) is a range of low, forested hills in the German states of Lower Saxony and North Rhine-Westphalia which is believed to be the scene of a decisive battle in AD 9. Until the 19th century the official name of the hill ridge was Osning.

View over the Teutoburg Forest.

The Battle of the Teutoburg Forest in 9 AD occurred in or near this region, though the exact location is disputed. The Roman historian Tacitus identified the location of the battle as saltus Teutoburgiensis (saltus meaning a forest valley in Latin). Recent excavations suggest that at least the final stages of the battle took place farther northwest, at Kalkriese, north of Osnabrück.

Teutoburg Forest in Give Me Back My Legions![]

In 9 AD, the Teutoburg Forest were the site of the ambush and annihilation of three legions led by Publius Varus. The ambush was the start of a general uprising of Germanic tribes against the Roman Empire led by Arminius.