`` For the earlier battle Hostile_encounter , see Battle Hostile_encounter of Chaeronea ( 338 BC ) '' The Battle Hostile_encounter of Chaeronea was fought Hostile_encounter by the Roman forces Causation of Lucius Cornelius Sulla and Mithridates ' general , Archelaus , near Chaeronea , in Boeotia , in 86 BC during the First Mithridatic War Military_operation .