I want to set up a battle between argonians and dark elves in the pale, but i'm finding it difficult making them fight. The only way i've been able to do it so far is to spawn in the two races and use the mayhem spell, but that leaves everyone with a red aura which i don't want. Any suggestions on how i can accomplish this guys?

Do you have access to the creation kit?

Otherwise, you'll have to use the console to set their aggression individually.

Or you could spawn Argonian bandits.