 Ovid's "Fasti" dates the Senate vote of Germanicus' triumph to 1 January AD 15.For the next two years, he led his legions across the Rhine against the Germans, where they would confront the forces of Arminius and his allies.Tacitus says the purpose of those campaigns was to avenge the defeat of Varus at the Battle of Teutoburg Forest, and not to expand Roman territory.