The Battle of Vindonissa was fought in 298 or 302 between the Imperial Roman army, led by Emperor Constantius Chlorus, and the Alemanni. The Romans won the battle, fought in Vindonissa, strengthening Rome's defenses along the Rhine. References Vindonissa Vindonissa 298 Vindonissa 298 Military history of Switzerland 3rd century Ancient Switzerland 298 290s in the Roman Empire