in an unknown location between Babylon and Susa, was the decisive and final clash of the Babylonian war.
He had been the province's satrap before, but was forced to leave, fearing Antigonus' increasing power and cruelty.
The Antigonids made several attempts to retake the "gateway" to the rich eastern satrapies, but ended in failure.
Antigonus made peace with the other diadochi (Ptolemy, Cassander and Lysimachus) and marched to Babylon with an army of 75,000 according to some sources, Seleucus then decided to wage a guerilla war, but Antigonus responded by pillaging and razing the territory, finally forcing Seleucus to face him on open ground, with a significantly smaller force.
Antigonus managed to escape and gave up on the idea of reconquering the upper satrapies leaving the east to Seleucus.