How did Roman campaigns under Drusus affect Germanic tribes?

Roman military campaigns led by Nero Claudius Drusus between 12 and 9 BCE significantly impacted the Germanic tribes by bringing vast territories under Roman influence and forcing tribal submission.

Key effects of these campaigns included:

• Subjugation of Tribes: Drusus successfully forced several tribes, including the Frisii, Chauci, Cherusci, and Chatti, to surrender to Roman authority.12
• Territorial Expansion: His expeditions pushed Roman control deep into Germania, reaching as far east as the Elbe River.12
• Infrastructure and Presence: To secure these gains, Drusus established military bases at strategic locations such as Vetera and Mogontiacum (modern Mainz) and oversaw the construction of the Fossa Drusiana, a canal connecting the Rhine to the North Sea.12
• Retrieval of Symbols: Some accounts suggest that Drusus successfully retrieved a lost Roman aquila (legionary eagle) that had been captured by the Sicambri tribe, restoring a measure of Roman honor.1

While these conquests were extensive, much of the territory was later lost following the Battle of the Teutoburg Forest in 9 CE.12