The Babylonian War was a conflict fought between 311–309 BC between Antigonus I Monophthalmus and Seleucus I Nicator, ending in a victory for Seleucus. This conflict ended any possibility of restoration of the former empire of Alexander the Great, a result confirmed in the Battle of Ipsus. The battle also marked the birth of the Seleucid Empire by giving Seleucus control over the eastern satrapies of Alexander's former territory.