New to SMAC : from where do you get all these factions ?

[Az]

SMAC playing .

day 1 :
passed the game as a civilian.
diplo victory

day 2 :
game at level 2 . already winning .
...
...
visit AC forums for the same day . for the first time , actually .
and ... what ? were did you take this factions ? angels ? drones ? pirates ? HELP!

[Paul]

Those factions are part of the Alien Crossfire expansion pack.