The decision of the Parthian king Artabanus II to place his son, Arsaces, on the vacant Armenian throne triggered a war with Rome in 36 AD. Artabanus III reached an understanding with the Roman general, Lucius Vitellius, renouncing Parthian claims to a sphere of influence in Armenia. A new crisis was triggered in 58, when the Romans invaded Armenia after the Parthian king Vologases I forcibly installed his brother Tiridates on the throne there. Roman forces under Corbulo overthrew Tiridates and replaced him with a Cappadocian prince. This prompted Parthian retaliation and an inconclusive series of campaigns in Armenia ensued. The war came to an end in 63, when the Romans agreed to allow Tiridates and his descendants to rule Armenia on condition that they received the kingship from the Roman emperor.