in 54 the newly ascended Roman emperor Nero sent his general, Corbulo to restore Roman authority in the country. Vologases was unable to aid his brother, due to the rebellion of his son Vardanes II and subsequently a revolt in the eastern Parthian province of Hyrcania. Supported by Vologases, Tiridates sent flying columns to raid the Romans far and wide in 58. Corbulo responded by using the same tactics. He also emboldened the Roman client-kings Antiochus IV of Commagene, Pharasmanes I, and the Moschi tribes to attack outlying areas of Armenia. The loyalty of the Armenian population was split up between the Parthians and Romans, although overall they preferred Parthian rule, due to it being more tolerant, and also due to the similarity between Parthian and Armenian culture. Corbulo conquered the Armenian capital of Artaxata, which he had destroyed. The following year (59) he conquered Tigranocerta in southern Armenia, where he wintered. Tiridates took advantage of this situation to return to northern Armenia from Atropatene. However, by the spring of 60, he was forced to withdraw by the Roman forces once more. Nero appointed a Cappadocian prince named Tigranes on the Armenian throne. The new ruler, protected by a strong Roman force, became bold and started in 61 attacking the border areas of Adiabene, a vassal kingdom of the Parthians. The Adiabenian king, Monobazos, including Tiridates, protested in front of the entire Parthian court, complaining that Vologases did not do enough to protect his subjects. This situation was important and endangered the relations between Vologases and his subjects. During a public feast, Vologases supported Tiridates' appeals, and placed the royal diadem on his head. He also appointed a certain nobleman named Monaeses as the commander of a Parthian force that included contingents from Adiabene. Monaeses was sent into Armenia, where he besieged Tigranocerta in 62. The city was strongly fortified, and had been further reinforced by two legions. The Parthians attempts to scale the city proved fruitless, with the Adiabenian contingents suffering heavy losses. At this point, Corbulo sent an envoy to Vologases, who had encamped with his court at Nisibis, near Tigranocerta and the Roman–Parthian border. The failed siege and a shortage of fodder for his cavalry forced Vologases to agree to withdraw Monaeses from Armenia. At the same time, however, the Romans also left Armenia, which, according to the contemporary Roman historian Tacitus, raised suspicions as to Corbulo's