Alliance are a serie of different mods. On the Star Wars GC, you can play the civil war Empire vs Rebel era + Black Sun and soon the Republic and CIS.
Because in the past people told how the mission 6 could not be finished. I have uploaded a video for show you.
At other point, even with all the problems, lag when deploy units and more, watching this video, you can see because EAW/FOC is very unique, different, fun and good.