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BATTLE // -65 BCE

Battle of the Lycus

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Overview

The Battle of the Lycus was fought in 66 BC between an army of Roman Republic under the command of Pompey the Great and the forces of Mithridates VI of Pontus. The Romans won the battle with few losses; their victory turned out to be decisive with Mithridates fleeing to the Kingdom of the Bosporus and committing suicide a few years later, finally ending the Third Mithridatic War.

Overview adapted from Wikipedia, licensed under CC BY-SA 4.0.

Significance

The Battle of the Lycus was fought in 66 BC between Roman forces under Pompey the Great and the army of Mithridates VI of Pontus. The Romans secured a decisive victory at relatively low cost, inflicting approximately 10,000 casualties on the Pontic force of 30,000. The battle's consequences extended well beyond the engagement itself: Mithridates fled to the Kingdom of the Bosporus following the defeat and died by suicide a few years later, removing the last resistance that had sustained the Third Mithridatic War. That war, which had drawn Rome into extended and costly conflict with Pontus across several decades, effectively ended as a result of the battle's outcome. The defeat of Mithridates VI, one of Rome's most persistent eastern adversaries, consolidated Roman dominance over the region and closed the long struggle that had defined Roman engagement in Anatolia and the Black Sea periphery.

Forces & casualties

Troop strength

  • Roman Republic50,000
    medium
  • Pontic Empire30,000
    medium

Roman Republic fielded a 1.7 : 1 numerical advantage

Casualties

  • Pontic Empire10,000
    medium33% loss rate

Commanders (2)

Pontic Empire

Roman Republic

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4 sibling battles · 0 factions

Last verified July 2026
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