Septimius Severus defeated and killed his ancient ally Clodius Albinus who had revolted against him.
Citation:
Bouchard, Elsa. "Battle of Lugdunum".
The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=11490, accessed 25 May 2013.]