How am I ever gonna explain this? The more you tighten your grip, Tarkin, the more star systems will slip through your fingers. I call it luck. Alderaan? I'm not going to Alderaan. I've got to go home. It's late, I'm in for it as it is. I find your lack of faith disturbing.
You start out in the middle of the map, surrounded by forces, who will turn against you once you fire a shot. Fire with left-click and run using up arrow.