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BATTLE // -72 BCE

Siege of Cyzicus

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Overview

The siege of Cyzicus took place in 73 BC between the armies of Mithridates VI of Pontus and the Roman-allied citizens of Cyzicus in Mysia and Roman Republican forces under Lucius Licinius Lucullus. It was in fact a siege and a counter-siege. It ended in a decisive Roman victory.

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

Significance

The Siege of Cyzicus was a decisive engagement of the Third Mithridatic War, pitting the forces of Mithridates VI of Pontus against the Roman-allied citizens of Cyzicus and a Roman Republican army under Lucius Licinius Lucullus. The disparity in recorded force sizes — 300,000 for the Pontic side against 30,000 Romans — underscores the scale of the Pontic commitment to reducing Cyzicus, a strategically significant city in Mysia. The outcome, a decisive Roman victory, checked Mithridates' capacity to project power in the region and reinforced Roman dominance over their allied communities in Asia Minor during this phase of the war.

Tactics

The battle took the form of a and counter-siege: Mithridates invested Cyzicus while Lucullus simultaneously moved to cut off and pressure the besieging Pontic forces, turning the operation into a dual containment effort rather than a straightforward assault or relief action.

Forces & casualties

Troop strength

  • Roman Republic30,000
    medium
  • Kingdom of Pontus300,000
    medium

Kingdom of Pontus fielded a 10.0 : 1 numerical advantage

Commanders (2)

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4 sibling battles · 0 factions

Last verified July 2026
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