Marcus Aurelius Probus (230–235 – September 282) was Roman emperor from 276 to 282. Probus was an active and successful general as well as a conscientious administrator, and in his reign of six years he secured prosperity for the inner provinces while withstanding repeated invasions of barbarian tribes on almost every sector of the frontier.

After repelling the foreign enemies of the empire Probus was forced to handle several internal revolts, but demonstrated leniency and moderation to the vanquished wherever possible. In his reign the constitutional authority of the Roman Senate was fastidiously maintained, and the victorious Emperor, who had carried his army to victory over the Rhine, professed himself dependent on the sanction of the Senate.

Upon defeating the Germans, Probus re-erected the ancient fortifications of emperor Hadrian between the Rhine and Danube rivers, protecting the Agri Decumates, and exacted from the vanquished a tribute of manpower to resettle depopulated provinces within the empire and provide for adequate defense of the frontiers. Despite his widespread popularity, Probus was killed in a mutiny of the soldiers while in the middle of preparations for the Persian war, which would be carried out under his successor Carus.