It gave him an opportunity of showing his military talents in the West, and of obtaining favor with Ptolemy, and with all those by whom Antigonus was dreaded.

When the great struggle came between the confederate monarchs and the aspirant after universal dominion, it placed him on the side of the allies.

Having recovered Babylon (B.C.

312), Seleucus led the flower of the eastern provinces to the field of Ipsus (B.C.

301), and contributed largely to the victory, thus winning himself a position among the foremost potentates of the day.