The First Mithridatic War (88–85 BC) began with Mithridates sweeping through Asia Minor, hailed as a liberator from Roman oppression. For decades, corrupt Roman 'Publicani' (tax farmers) had ruthlessly exploited the province, driving the population into destitution and debt slavery. Capitalizing on this deep-seated resentment, Mithridates cleverly won over the Greek cities by promising freedom, cancelling all debts, and remitting taxes for five years. This populist strategy culminated in the 'Asiatic Vespers', a coordinated massacre of 80,000 Romans and people from Italy in a single day, which irrevocably bound the cities to his cause.
He then turned his eyes to Greece, sending his generals to capture Athens. There, he installed the philosopher-tyrant Aristion, who ruled with an iron fist. Mithridates also targeted the sacred island of Delos, a major slave market and Roman stronghold, where his forces slaughtered 20,000 people from Italy.
However, the tide turned when the ruthlessly efficient Roman general Sulla arrived. Sulla besieged Athens and Piraeus, eventually sacking the city. In the battles of Chaeronea and Orchomenus, Sulla's disciplined legions crushed the numerically superior Pontic armies. The war ended with the Treaty of Dardanos, which forced Mithridates to abandon all his conquests in Greece and Asia Minor, pay a heavy indemnity, and surrender part of his fleet, although he retained his kingdom.
The Second Mithridatic War (83–81 BC) was a brief but significant interlude. It began when the Roman general Murena, Sulla's lieutenant left in command of Asia, launched an unprovoked attack on Pontus to win a triumph. Mithridates, acting in self-defense, inflicted a humiliating defeat on Murena at the Battle of Halys. Sulla, wanting to maintain the peace, ordered Murena to stop. This victory bolstered Mithridates' prestige and exposed the fragility of the peace.
The Third Mithridatic War (73–63 BC) was sparked by the death of King Nicomedes IV of Bithynia, who bequeathed his kingdom to Rome. Seeing this as a threat, Mithridates invaded Bithynia. Rome sent Licinius Lucullus, who brilliantly outmaneuvered Mithridates at the Siege of Cyzicus and crushed his army. After another defeat at the Battle of Cabira, Mithridates was forced to flee his own kingdom. He sought refuge in Armenia with his son-in-law, Tigranes the Great. When Lucullus demanded Mithridates' surrender, Tigranes famously refused, stating that 'the world would rightfully condemn him' if he betrayed his own father-in-law. This refusal gave Lucullus the pretext to invade Armenia, leading to the decisive Battle of Tigranocerta.
Despite Lucullus's brilliant victories, his soldiers, exhausted by years of campaigning and harsh discipline, mutinied and refused to advance further. Taking advantage of this, Mithridates returned to Pontus and reclaimed his kingdom. In 66 BC, Rome replaced Lucullus with Pompey the Great. Pompey, commanding overwhelming forces, finally drove Mithridates to flight. Betrayed by his son Pharnaces and cornered in the Crimea, the old king took his own life in 63 BC, ending the wars and cementing Roman dominance in the East.