He succeeded upon the death of his father Artag who had been defeated by the Roman general Pompey in 65 BC. However, Roman hegemony over Iberia proved to be impermanent, and, in 36 BC, the legate Publius Canidius Crassus led his army into Iberia, forcing Parnavaz to make an alliance against Zober, king of neighboring Albania. Canidius and Parnavaz marched to Albania and subdued its people. Incidentally, no Georgian source documents these events reported by Cassius Dio in his Roman History Instead, the Georgian annals concentrates upon the homecoming of Mirvan, the exiled son of Parnajom, who had been brought up in Iran. Mirvan returned to Kartli at the head of an Iranian army, killed Bartom and became a king. Bartom is said to have adopted Kartam, the grandson of Kuji (the alleged ruler of Egrisi in the time of the first Iberian king Parnavaz). But Kartam had also been killed in battle against Mirvan. Nevertheless, Kartam’s pregnant wife – the daughter of Bartom – fled to Armenia where she gave birth to a son named Aderki.