Mithradates VI launched a third war with the Romans by attacking their newly-acquired province of Bithynia. After various military failures he was finally defeated by Pompey.
Bouchard, Elsa. "Third Mithradatic War". The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=11397, accessed 20 December 2014.]