The third saw an alliance with Tigranes the Great and battles at Cyzicus and Lycus.  
The first skirmish in them was fought on Mount Scorobas, and was followed by battles at Orchomenos and Chaeronea, both defeats for the general Archelaus.  The second of them saw Lucius Murena take over the armies of Flavius Fimbria, after the first of these contests had been ended by the Treaty of Dardanus. The third saw an alliance with Tigranes the Great and battles at Cyzicus and Lycus.  That conflict involved a commander named Lucius Lucullus, who was replaced by Pompey.  FTP, name this series of three wars against the Romans beginning around 90 B.C., named for the King of Pontus who instigated them.
The first skirmish in them was fought on Mount Scorobas, and was followed by battles at Orchomenos and Chaeronea, both defeats for the general Archelaus.  
Mithridatic Wars (or wars of Mithridates VI, I suppose)