Easy peasy..
Code:
faction_mod_relation
DESCRIPTION: sets relation of two factions
PARAMETERS: FactionID(Integer), FactionID(Integer), enemy/ally/neutral(String)
EXAMPLE: /faction_mod_relation 1001 1002 enemy
So to set the outcasts at war with the scavengers:
Code:
/faction_mod_relation -9999999 -9999998 enemy
I think this will probably reset fairly quickly though, as the factions are currently designed to accept peace treaties pretty quickly and often offer them to each other, even when they never seemed to be at war.
Anyway, give it a try and let us know how it goes!
Also, if the factions aren't spawning for you, check out this thread:
Is the new Faction/fleet stuff broken on Linux?
IDK if that will help, but the trick worked for me.... Also, the NPC factions only spawn on new world startup. You have to give a command if you want them to spawn in an existing world. HTH!
Cheers,
CS