IOTL, during the Wars Of The Diadochi, there was a pitched battle between Antigonus I Monophthalmus on one side, and a coalition of Seleucus I Nicator, Cassander of Macedon, and Lysimachus of Thrace on the other side.
Here's a map of the near east, previous to the Battle Of Ipsus:
Antigonus...