The Fimbrian or Valerian legions were two Roman legions which served and fought in all three wars against King Mithridates of Pontus, one of the Roman Republic's chief adversaries during the 80s, 70s and 60s BC. They became a body of long serving legionaries known for their fierce fighting reputation and also, more infamously, for mutiny and abandoning their commander. The legions take their name from the consul Lucius Valerius Flaccus, who first recruited them in 86 BC, and from his subordinate, Gaius Flavius Fimbria, who took command of the legions after inciting a mutiny and murdering Flaccus.
| Valerian/Fimbrian legions | |
|---|---|
| Active | 86 BC–66 BC |
| Country | Roman Republic |
| Branch | Roman Army |
| Type | Roman Legions |
| Size | 10,000 legionaries (2 legions) |
| Engagements | First Mithridatic War Second Mithridatic War Third Mithridatic War |
| Commanders | |
| Notable commanders | Lucius Valerius Flaccus Gaius Flavius Fimbria Lucius Licinius Lucullus Lucius Licinius Murena Pompey |