Steadily harassed by the Germans, in 58 BC the Helvetii decided to abandon the Swiss plateau and migrate to western Gallia, but Julius Caesar's armies pursued and defeated them at the Battle of Bibracte, in today's western France, forcing the tribe to move back to its original homeland.
Which Swiss tribal group was defeated by Julius Caesar at the Battle of Bribacti as they tried to escape the Swiss plateau?
the Helvetii