Subsequently Ptolemy gave him 200 cavalry and 800 foot soldiers, and he began his advance towards his old satrapy of Babylon.
Seleucus marched towards Harran (also known as Carrhae) where he was joined by around 1000 veteran troops, probably a portion of the Silver Shields captured at Gabiene.
The populace welcomed him, as he was well regarded by them, but a small force loyal to Antigonus entrenched themselves in the citadel of the palace.
In the ensuing downstream flood the walls of the citadel were destroyed and the garrison surrendered after token resistance.
Seleucus became ruler of Babylon again, however, Antigonus had enough power to recapture the city at any moment, and one of his generals, Nicanor was already on the way.