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.
I have some changes. The Jedi Academy - Dark Saber conflict will be renamed to the Dark Saber GC. There will be some new heroes and it will start without destroy Carida.
You will note by the screenshots how the story from Crisom Empire will be more integrated in the GC.
Is that the one where the only planets the Empire has are The Maw and Cardia? Because thanks, I hated Cardia getting instantly destroyed at the start, leaving me without ground troops. (If that's a different GC, please fix that)
You can find it in the mod campaign.