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.
Probably you think that I´m crazy but the Birth of the Rebellion GC will add all factions from the mod, each of them will start with one single planet. I´m sure that many people will enjoy it because there will not be limits and you will be able to play with the Republic or Separatatist against Hapan, Rebels, Corporate Sector, Hutts, Chiss, Empire or Black Sun. There will be two versions, one with few and one with many planets, a complete GC with 9 factions. Have fun.