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.
Thanks to Warhammer_81, I could get in my hands this curious model. In my FOC Alliance, it will be a special constructor unit. This thing, it will be neccesary if you want build the Advance Command Center at ground or the Shipyards in orbit. Black Sun and Rebels will get other special units.
Specially the main point from a heroe unit triggering the shipyards and other structures is to create a different building tree for the multiplayer where you can from some way to build all the units.