Babylon's old leader Hammurabi had them in a bad spot and they got attacked by the Assyrians. And there new leader Nebunchadnezzar had rebuilded the city of Babylon from the attack of the Assyrians.
Complicated question actually. Commander Sinclair was the original man in charge of Babylon 5, but left to become an ambassador to Minbar which was kind of a cover for him looking after a group of...