Probus, Roman Emperor

Probus (Latin: Marcus Aurelius Probus Augustus; c. 19 August 232 – September/October 282), was Roman Emperor from 276 to 282. During his reign, the Rhine and Danube frontier was strengthened after successful wars against several Germanic tribes such as the Goths, Alamanni, Longiones, Franks, Burgundians, and Vandals. However, the Agri Decumates and much of the Limes Germanicus in Germania Superior were officially abandoned during his reign, the Romans withdrawing to the Rhine and Danube rivers.

http://en.wikipedia.org/wiki/Marcus_Aurelius_Probus