This expansion playable with either Caesar: Conquest of Gaul or by combining The Great Battles of Julius Caesar: The Civil Wars 48-45 B.C. with the Dictator: Caesar Module module. This module came in RBM/GMT's C3i Magazine Nr11.
This module covers two battles with the Germans battling the Romans including the famous battle of Teutoburg Forest where Varus managed to lose 3 Roman legions
Teutoburg Forest, August AD 9
Idistaviso, AD 16