their old home (now Switzerland) to prevent the Germans from expanding into the empty land. 2
It was already too late for that.
Ariovistus
To the north, two Gallic tribes of the Rhine Valley, the Aedui and the Sequani, were having a war, so the Sequani hired the Suebi, a German tribe under Ariovistus, to come help. After the Aedui were beaten, however, Ariovistus wouldn’t leave. He seized a third of the Sequani territory, where he settled 120,000 of his own people. Then Ariovistus increased his claim to two-thirds of the Sequani territory.
Caesar, however, was not going to let the Germans assemble a powerful new territory so close to the Roman frontier, so in response to pleas from the Aedui, he demanded the Suebi withdraw. When Ariovistus sneered at the request, Caesar took 30,000 men north in September. The two sides parleyed and maneuvered for a while, until the Roman camp at Vosges found itself surrounded by 70,000 screaming Germans. The Romans calmly formed their lines and attacked. They routed the Suebi and chased them fifteen miles in close pursuit. Having lost 25,000 men, the Suebi escaped back across the Rhine, and Ariovistus was soon rumored to be dead, probably killed in disgrace by his own people.
Probing Outward
For the next year, Caesar stayed in the north battling the Belgae, a major coalition of Gallic tribes that was arming itself to block Roman expansion. In June 56 BCE, Caesar built a wooden bridge over the Rhine in ten days, the first ever to span the river. This awe-inspiring feat of engineering intimidated most of the local tribes into giving him hostages as a token of surrender. Caesar had to spend only eighteen days across the river burning the towns of the one tribe that resisted him. He destroyed the bridge upon retreat rather than leave it as an unguarded back door into the empire.
Caesar crossed over to Britain in 55 BCE to see whether it was worth conquering. He took only two legions, either because he planned no more than a reconnoiter or because he arrogantly assumed that two would be enough to subjugate the island. In any case, the British proved more formidable than he had expected. He ran dangerously low on supplies but raided out from his beachhead and destroyed some villages to show he wasn’t going to be bullied into a retreat. Then he retreated to the mainland.
By now, Caesar had picked up two new legions for a total of eight. In the winter of 54–53 BCE, King Ambiorix of the Germanic Eburones tricked the local Roman forces into accepting safe passage across his territory, but then he ambushed them. Most of a Roman legion was wiped out, losing its eagle—the visible symbol of the legion and a powerful talisman. The survivors fled back to their camp and committed suicide rather than become prisoners of the Germans.
Caesar arrived and retaliated by destroying every village and farm in the territory of the Eburones. Although most of the people fled and hid from direct Roman vengeance, they now starved in the winter. Caesar also gave the neighboring tribes permission to do whatever they wanted to to the Eburones. Although we don’t know exactly what these tribes did, it was certainly awful. History never mentions the Eburones again.
By 53 BCE, Caesar had ten legions. From the north, he turned around and swept through Gaul again, making sure all of the tribes knew who was in charge. He crushed a string of stubborn Gallic tribes one by one, selling women and children to the slavers who followed his army everywhere it went. Plutarch reports that a million Gauls were taken captive during Caesar’s campaigns. The flood of cheap slaves into Italy eventually impoverished the Roman working class, which in turn undermined the democratic foundations of the republic.
The campaign complete, Caesar was able to declare the whole region to be Roman territory. Although every Gallic army that had stood up to the Romans had been beaten, the Gauls decided to take one last shot at