Ariovistus
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Ariovistus was a king of a German tribe who was invited by the Arverni, a Celtic tribe in Gaul, to aid them against their rivals, the Aedui, around 60 BCE. This intervention by Ariovistus provided Julius Caesar with a reason to initiate the Gallic Wars. Caesar halted Ariovistus's advance by defeating him in the Sundgau in 58 BCE. The migrations of Germanic peoples, including those led by figures like Ariovistus, were significant in shaping the distribution of populations in Europe and ultimately contributed to the fall of the Western Roman Empire.12
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