 Maximian did not put down the Bagaudae swiftly enough to avoid a Germanic reaction . In the autumn of 285 , two barbarian armies – one of Burgundians and Alamanni , the other of <unk> and Heruli – forded the Rhine and entered Gaul . The first army was left to die of disease and hunger , while Maximian intercepted and defeated the second . He then established a Rhine headquarters in preparation for future campaigns , either at Moguntiacum ( Mainz , Germany ) , Augusta Treverorum ( Trier , Germany ) , or Colonia Agrippina ( Cologne , Germany ) . 
