"I Vespri asiatici furono un eccidio commesso in Asia Minore nell'88 a.C. . In risposta al crescente potere romano in Anatolia, Mitridate VI Eupatore, re del Ponto (Mitridate il grande), sfruttò lo scontento locale per il governo romano e le sue tasse per orchestrare l'esecuzione di circa 80.000 /150.000  Italici in Asia Minore, o di chiunque parlasse con un remoto accento latino.. Quest'azione portò il Senato romano, di norma prudente, a inviare una grande forza militare in Oriente, con l'obiettivo di ridurre il potere del regno del Ponto ed eventualmente di annettere quel territorio, cosa che avverrà con una serie di conflitti noti con il nome di Guerre mitridatiche.. "
Si può osservare che Mitridate aveva fatto una selezione in base etnica della popolazione del suo regno. Si veda al LINK, che cosa significa genocidio.
"The Asiatic Vespers (also known as the Asian Vespers, Ephesian Vespers, or the Vespers of 88 BC) refers to an infamous episode during the First Mithridatic War. In response to increasing Roman power in Anatolia, the king of Pontus, Mithridates the Great, tapped into local discontent with the Romans and their taxes to orchestrate the execution of all Roman and Italian citizens in Asia Minor (Anatolia).
The massacre was planned scrupulously to take place on the same day in several towns scattered over Asia Minor: Ephesus, Pergamon, Adramyttion, Caunus, Tralles, Nysa, and the island of Chios. Estimates of the number of men, women, and children killed range from 80,000 to 150,000. Slaves who helped to kill their Roman masters and those who spoke languages other than Latin were spared. The massacre led to the Roman Senate committing a huge invasion force aimed at breaking the power of the Kingdom of Pontus and eventually annexing their territory in a series of conflicts known as the Mithridatic Wars.
The date of the massacre is disputed by modern historians who have written about the question at length. Sherwin-White places the event in late 89 or early 88 BC. Badian, saying "precision seems impossible," places it in the first half of 88 BC, no later than the middle of that year.
In livius.org, Mithridates is defined as "enemy of Rome in first century BCE", by Jona Lendering, who is telling that "The conflict with Rome that was to last for the rest of Mithridates' life became inevitable in 94, when Nicomedes III of Bithynia died and was succeeded by Nicomedes IV Philopator." Lendering is not mentioning the infamous massacre.
That is, he is not mentioning the act of Mithidates of selecting, amongst the population of his kingdom, the Latin people to slaughter them in large number. Actually, in Oxford dictionary, we find that the "genocide" means "the deliberate killing of a large group of people, especially those of a particular nation or ethnic group".