Battle of Placentia

At least four battles involving Roman armies took place at or close to the ancient Roman city of Placentia (modern Piacenza):
 * Battle of Placentia (194 BC)
 * A civil war battle (siege) fought between forces of the Emperor Otho and his opponent Vitellius, (69 AD, the Year of the Four Emperors)
 * Battle of Placentia (271) AD
 * A civil war battle between the armies under the Emperor Majorian and general Ricimer on one side against the usurper Avitus (17 October 456 AD).