Welcome to Babylon 5! Sort of….
B5 01

Babylon 5 fans will recognize a lot of the B5 universe and then again they won’t recognize other parts. Every action that the players do or don’t do may alter future events or they may not. In other words, just because it happened in the TV series doesn’t mean it will happen that way in this campaign

For example, Earth now has an ambassador to represent it on the advisory council, while the EarthForce commanding officer acts as a military governor with the Babylon 5 staff (military & civilian) to run, maintain and provide security for the station.

After that, take a look at your wiki. There is some more helpful info there.

Where Vorlons Fear to Tread