Hadrian was Roman emperor from 117 to 138 having been adopted as the successor to Trajan. He saw military service in the Dacian Wars (102 - 3 and 105 - 6). Hadrian abandoned Trajan's policy of expansion. He toured the Empire overhauling the military establishment and consolidating the frontiers. He is known for building Hadrian's Wall, which marked the northern limit of Britannia.
