Ah, now we're talking. The thing that sets the Imperial campaign apart from the Rebel one is that the Imperial side spends a lot more time on offense. Starting right here, with taking over a supply yard.
This is the template that a lot of the following missions will run - play a little bit of defense for some capturing transports or other ships, but mainly blow up a bunch of stuff! There's plenty of challenges ahead, but this is where it starts get fun.