Diocletian and constantine were the greatest of the late roman emperors and their era marks the climax of the legionary system under constantines successors the legions were reduced in size and increasingly sidelined in favour of new units of elite auxilia but between ad 284 and 337 the legions reigned supreme. Buy roman legionary ad 284 337 the age of diocletian and constantine the great warrior by cowan ross obrogain sean isbn 9781472806666 from amazons book store everyday low prices and free delivery on eligible orders. Roman legionary ad 284 337 the age of diocletian and constantine the great warrior amazonin cowan ross obrogain sean books. Roman legionary ad 284 337 the age of diocletian and constantine the great warrior book 175 ebook cowan ross obrogain sean amazoncomau kindle store. Diocletian and constantine were the greatest of the late roman emperors and their era marks the climax of the legionary system under constantines successors the legions were reduced in size and increasingly sidelined in favour of new units of elite auxilia but between ad 284 and 337 the legions reigned supreme