Battle of Gaugamela
After Philip is assassinated, Alexander becomes King of Macedonia. Ptolemy mentions Alexander's punitive campaign in which he razes Thebes, also referring to the later burning of Persepolis, then gives an overview of Alexander's west-Persian campaign, including his declaration as the son of Zeus by the Oracle of Amun at Siwa Oasis, his great battle against the Persian Emperor Darius III in the Battle of Gaugamela, and his eight-year campaign across Asia.