In 9 CE, after the Roman forces were destroyed in the Teutoburg Forest, Arminius managed to destroy all the Roman clusters on the eastern side of the Rhine. The only fort that managed to resist the Germans was fort Aliso, whose crew was commanded by prefect Lucius Ceditius, to whom managed come the survivers from the slaughter before the Germans.
Over the next few weeks, and perhaps months, the fort fought off the Germans’ attacks. Eventually, crew broke through the siege ring and reached the Roman forces west of the Rhine.
