Antiochus IX took note of Seleucus VI's preparations; after the latter started his march on Antioch in 95BC, Antiochus IX left the capital and moved against his nephew. Seleucus VI emerged victorious while his uncle lost his life, either by committing suicide according to the 3rd-century historian Eusebius, or by being executed according to the 1st-century historian Josephus. Soon afterwards, Seleucus VI entered the capital; Cleopatra Selene probably fled before his arrival.
