Antiochus VIII ruled from the city of Antioch whilst Antiochus IX based himself in Ptolemais. He soon forged a new alliance with Egypt by taking the Princess Cleopatra IV, the sister of Grypos’ Queen, Tryphaena, as his wife. The brothers eventually agreed to partition the kingdom but this did not create a lasting peace but rather promoted competition between the Northern and Southern branches of the House of Seleucus.
