Third Mithridatic War
As one of his last acts as king of Bithynia, in 74 BC, Nicomedes IV bequeathed the entire kingdom of Bithynia to Rome. The Roman Senate quickly voted it as a new province. Rome's old enemy Mithridates VI of Pontus had other plans for Bithynia, however, and Nicomedes IV's death and bequeathal led directly to the Third Mithridatic War.