To which event where three Roman legions were distroyed is the phrase The German Forest sometimes used to refer to?
Battle of the Teutoburg Forest: The Battle of the Teutoburg Forest (German: "Schlacht im Teutoburger Wald" , "Hermannsschlacht", or "Varusschlacht"), described as the Varian Disaster ("Clades Variana") 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.
i don't know