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.
If you have not watched the video with the new KDY Endurance Moddb.com , you can see it on these screenshots. Of course I recomend you watch the video, you can see a few more things as the new ETA 5 or the new particle explosions, specially these are very different to all the other explosions seen at EAW/FOC. As always very unique.