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.
This is a example from the future work in progress is from the Vong. Most of these models were made by Arachno.R and he has shared them with me, some of them are ground units and others from space. With these, few more from Evillejedi and few more new, the Vong will be a very good faction when they be made after the 5.0. I repeat they will not be added in the 5.0. Have fun.