Battle of the River Amnias

The Battle of the River Amnias was a battle fought in 89 BC between Mithradates VI of Pontus and Nicomedes IV of Bithynia during the First Mithridatic War. The forces of Pontus were commanded by Archelaus and Neoptolemus, while the Bithynians were led by King Nicomedes himself. Pontus was victorious. This battle and subsequent events would lead to the loss of Roman rule in the province of Asia for some years.

The Pontic army was under the overall command of Mithridates, who had a force of 250,000, compared to Nicomedes, who only had 50,000 infantry and 6,000 cavalry. The Pontic advance force at the Amnias River, where this battle took place, was commanded by the brothers Neoptolemus and Archelaus, who had a force that according to Appian was outnumbered by Nicomedes, despite the size of the whole Pontic army.

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