The first century BCE was a time of the expansion of Germanic-speaking peoples at the expense of Celtic-speaking polities in modern southern Germany and the Czech Republic. Before 60 BCE, Ariovistus, described by Caesar as king of the Germani, led a force including Suevi across the Rhine into Gaul near Besançon, successfully aiding the Sequani against their enemies the Aedui at the Battle of Magetobriga. Ariovistus was initially considered an ally of Rome. In 58 BCE, with increasing numbers of settlers crossing the Rhine to join Ariovistus, Julius Caesar went to war with them, defeating them at the Battle of Vosges. In the following years Caesar pursued a controversial campaign to conquer all of Gaul on behalf of Rome, establishing the Rhine as a border. In 55 BCE he crossed the Rhine into Germania near Cologne. Near modern Nijmegen he also massacred a large migrating group of Tencteri and Usipetes who had crossed the Rhine from the east.
The first century BCE was a time of the expansion of Germanic-speaking peoples at the expense of Celtic-speaking polities in modern southern Germany and the Czech Republic. Before 60 BCE, Ariovistus, described by Caesar as king of the Germani, led a force including Suevi across the Rhine into Gaul near Besanço,n, successfully aiding the Sequani against their enemies the Aedui at the Battle of Magetobriga. Ariovistus was initially considered an ally of Rome. In 58 BCE, with increasing numbers of settlers crossing the Rhine to join Ariovistus, Julius Caesar went to war with them, defeating them at the Battle of Vosges. In the following years Caesar pursued a controversial campaign to conquer all of Gaul on behalf of Rome establishing the Rhine as a border. In 55 BCE he crossed the Rhine into Germania near Cologne. Near modern Nijmegen he also massacred a large migrating group of Tencteri and Usipetes who had crossed the Rhine from the east.