Darius III
Though the exact birth-date of Ariobarzanes is unknown, it is speculated that he was born around 368 BC. His sister was the ancient Persian noblewoman and warrior Youtab. Ariobarzanes was made satrap of Persis (the southern province of Fars in present-day Iran) in 335 BC by Darius III Codomannus. Historians are surprised that Darius III appointed a satrap for Persepolis and Persis; apparently that office did not previously exist. Ariobarzanes commanded part of the Persian Army fighting against the Macedonians at the Battle of Gaugamela in 331 BC.