 Rome then installed Artavasdes II as king and continued its influence over Armenia.In 53 BC, Rome's governor of Syria, Marcus Licinius Crassus, led an expedition across the Euphrates River into Parthian territory to confront the Parthian Shah Orodes II.Artavasdes II offered Crassus the aid of nearly forty thousand troops to assist his Parthian expedition on the condition that Crassus invade through Armenia as the safer route.