Drusus first entered politics with the office of quaestor in AD 10. His political career mirrored that of Germanicus, and he assumed all his offices at the same age as him. Following the model of Augustus, it was intended that the two would rule together. They were both popular, and many dedications have been found in their honor across Roman Italy. Cassius Dio calls him "Castor" in his "Roman History", likening Drusus and Germanicus to the twins, Castor and Pollux, of Roman mythology.