Question: What leader, born in Pella in 356 BC, conquered the army of Darius III in 331 BC?

Grabos (Latin: "Grabus" ; ruled c. 358–356 BC) was the king of the Grabaei, a minor tribe in Illyria, located somewhere in what is today the northern half of Albania.  According to Hammond, Grabos belonged to the royal house of the Grabaei, although the tribe may have been incorporated into the Taulantii realm of which Grabos became king.  Hammond believes that Grabus, the Taulantii ruler, was his ancestor.  After Philip II of Macedon defeated Bardylis (358 BC), the Grabaei under Grabos became the strongest state in Illyria.  Philip II had killed 7,000 Illyrians in a great victory and annexed the territory up to Lake Ohrid.  Very soon after the presumed alliance between the Chalkidians (Paeonian king Lyppeius and Thracian king Cetriporis) and Grabos in Athens in midsummer 356 BC, Grabos was defeated by Macedonian general Parmenion.  The said alliance was found in a fragment at Olynthus, in unfinished state and thrown into a riverbed suggesting that it was never ratified.  No more is heard of him. <SEP>  He was born in Pella in 356 BC and succeeded his father Philip II to the throne at the age of twenty.  He spent most of his ruling years on an unprecedented military campaign through Asia and northeast Africa, and he created one of the largest empires of the ancient world by the age of thirty, stretching from Greece to northwestern India. Alexander III of Macedon (20/21 July 356 BC – 10/11 June 323 BC), commonly known as Alexander the Great (Greek: Ἀλέξανδρος ὁ Μέγας , "Aléxandros ho Mégas" ), was a king ("basileus") of the Ancient Greek kingdom of Macedon and a member of the Argead dynasty.  He was undefeated in battle and is widely considered one of history's most successful military commanders. <SEP> Erigyius (in Greek Eριγυιoς; died 328 BC), a Mytilenaean, son of Larichus, was an officer in Alexander the Great's army.  He had been driven into banishment by Philip II, king of Macedon, because of his faithful attachment to Alexander, and returned when the latter came to the throne in 336 BC.  At the battle of Gaugamela, 331 BC, he commanded the cavalry of the allies, as he did also when Alexander set out from Ecbatana in pursuit of Darius III, 330 BC.  In the same year Erigyius was entrusted with the command of one of the three divisions with which Alexander invaded Hyrcania, and he was, too, among the generals sent against Satibarzanes, whom he slew in battle with his own hand.  In 329 BC, together with Craterus and Hephaestion, and by the assistance of Aristander the soothsayer, he endeavoured to dissuade Alexander from crossing the Jaxartes river against the Scythians.  In 328 BC he fell in battle against the Bactrian fugitives. <SEP>  In 331 BC Alexander's army of the Hellenic League met the Persian army of Darius III near Gaugamela, close to the modern city of Dohuk (Iraqi Kurdistan). The Battle of Gaugamela ( ; Greek: Γαυγάμηλα ), also called the Battle of Arbela (Greek: Ἄρβηλα ), was the decisive battle of Alexander the Great's invasion of the Persian Achaemenid Empire.  Even though heavily outnumbered, Alexander emerged victorious due to his army's superior tactics and his deft employment of light infantry.  It was a decisive victory for the Hellenic League and led to the fall of the Achaemenid Empire.