Lably
Skip to content

First Mithridatic War

War between Rome and Pontus, 89–85 BC

  • 29 min read
  • 5 chapters

Explore on Lably

ToursExplore Lably’s 3D tours

The war began after more than a decade of geopolitical manoeuvring by Mithridates, who managed to considerably extend his realm despite constant Roman attempts to restrain him. In 90 BC, a Roman delegation headed by Manius Aquillius provoked Mithridates into war, as Aquillius hoped to receive its command. The following year, Mithridates rapidly captured the Roman province of Asia, exploiting local resentment of Roman tax collectors to massacre the Roman settlers. Taken by surprise while it was fighting a large revolt of its allies in Italy, Rome was initially unable to respond. This allowed Mithridates to encourage more defections from Greek cities, most notably Athens, where he installed the tyrant Aristion.

In Rome, the attribution of the command of the Mithridatic War led to civil strife, which was won by Sulla after he made a coup by marching his army on the city in 88 BC. However, once Sulla left Italy, his enemies Marius and Cinna seized power and declared him a public enemy. As a result, Sulla waged the war on his own as a rogue general. His campaign was swift: in 86 BC, he took Athens, then crushed Mithridates' general Archelaus in central Greece at the battles of Chaeronea and Orchomenos. Meanwhile, the official Roman government dispatched its own army to fight Mithridates, led by Lucius Valerius Flaccus, who was murdered by his lieutenant Fimbria. The latter then crossed into Asia and successfully conducted his own campaign against Mithridates.

At this point, Sulla realised that Fimbria could rob him of his victory, so he offered a generous peace to Mithridates called the treaty of Dardanos, restoring the situation to its pre-89 BC state. Soon after, Sulla convinced Fimbria's soldiers to defect and forced him to commit suicide, thus removing the last threat to his private empire in the East. In 83 BC, Sulla left Greece to fight the Cinno-Marians, against whom he won a civil war, which enabled his rule as dictator in Rome. However, Sulla's settlement of the East was short-lived; hostilities rapidly resumed in the Second Mithridatic War (83–81 BC), fought on the Roman side by Murena, the lieutenant that Sulla had left behind in Asia.

Origins of the war

Pontic expansion

Rome entered for good in Asia Minor in 133, when the last king of Pergamon, Attalus III, bequeathed his kingdom to the Republic. The province of Asia was created in its place in 129, which put the Roman borders close to several kingdoms located in the area. The largest of those was that of Pontus, ruled by the Mithridatids, a dynasty of Persian origin, claiming descent from Darius the Great. Their control of the Greek city-states of the northern coast of Anatolia added a significant Hellenistic touch to the kingdom.

Mithridates VI Eupator became king c. 120 at 13. At his majority, he started an expansionist policy towards the coast of the Black Sea and the interior of Asia minor. In 107 he obtained Lesser Armenia and Colchis, an area rich in timber used for building ships, but the details of these acquisitions are unknown. He provided military assistance against the Scythians to the Greek cities of the Black Sea, such as Apollonia Pontica, Olbia, Odessus, and Tyras, which made alliances with him. After he was bequeathed the Bosporan Kingdom (in modern Crimea), Mithridates controlled all the eastern shore of the Black Sea by the end of the 2nd century. Mithridates also expanded into Asia Minor, thanks to his alliance with Nicomedes III of Bithynia. The two kings first invaded Paphlagonia in 108–107 and shared the land between them. The same year, Mithridates occupied a part of Galatia, the area in central Anatolia populated by three Celtic tribes. He also murdered the king of Cappadocia c.100 and placed his son on its throne, but this time Rome reacted and forced Mithridates and Nicomedes III to release Paphlagonia and Cappadocia, on which throne Ariobarzanes was placed.

After this setback, Mithridates turned to his eastern neighbour Armenia, where a new king ascended to the throne in 95: Tigranes II, to whom he gave his daughter Cleopatra in marriage. In exchange, in 92, Tigranes II invaded Cappadocia, expelled Ariobarzanes, and gave the land to Mithridates. This new aggression prompted Rome to intervene again; as propraetor, Lucius Cornelius Sulla was sent there and engaged Cappadocian troops led by the Pontic general Archelaus. At the same time, Mithridates took possession of Bithynia by expelling his nephew Nicomedes IV—the son of his former ally—, then removed Ariobarzanes from Cappadocia a second time after Sulla had left. The Social War that had started between Rome and its former Italian allies in 91 emboldened Mithridates to conquer his neighbours, defying Roman orders.

Aquillius' embassy (90–89 BC)

At the end of 90, after hearing the complaints of the kings in exile Ariobarzanes and Nicomedes IV, the senate sent a new embassy, headed by Manius Aquillius, a former consul, the son of the homonymous consul of 129 that had won the war against Aristonicus. Aquillius and Manlius Mancinus, another ambassador, were notably Gaius Marius' friends. After having restored the two kings without a fight, the embassy requested that they attack Pontus; deep in debts with Rome, Nicomedes complied and ravaged Pontus up to Amastris to recover his wealth. Mithridates did not oppose him, but still started recruiting soldiers from the Black Sea area. The king wanted to gain time and sent his ambassador Pelopidas to last chance negotiations with Aquillius in Pergamon, which took place in the spring of 89. These negotiations were marred with sophistry and spurious agreements; Mithridates listed his claims over Cappadocia and Bithynia and presented himself as a victim of Nicomedes' pillage, while the latter detailed how Mithridates breached the treaties and prepared for war. In a second meeting several weeks later, as Aquillius had already sided with Nicomedes, Pelopidas accused him of acting for his own benefit and threatened to go directly before the senate, which angered the commissioners and ended the talks, making war inevitable.

Aquillius wished the negotiations to fail, by compelling Pelopidas to leave the talks twice. His intentions were likely to force a war to which he would have been appointed commander. Although Mitridates' aggressive expansion was a major factor, modern historians put most of the immediate responsibility of the war on Aquillius, who "act[ed] out of greed and personal ambition", against the will of the senate. T. J. Luce suggested that Aquillius was working on the behalf of his friend Gaius Marius, who was eyeing a comeback at the centre of Roman politics by getting the command of the war against Mithridates. Marius had conspicuously made a private trip in the area in 98, during which he met Mithridates.

A minority opinion on the origins of the war is given by Kallet-Marx, who thinks that the blame placed on Aquillius found in the work of Appian initially came from the lost Memoirs of Rutilius Rufus, a former consul who was forced into exile in Mytilene after he confronted some publican friends of Marius in Asia. Kallet-Marx instead thinks that the commissioners only wanted to restore the two kings and were taken by surprise by Mithridates’ reaction into a full-scale war.

Sign in to keep reading

4 more chapters are free with a Lably account.

More in Ancient history