Sending away allied reinforcements

[Yes, I have a Mic.]

I just had my defences blown to hell because some ♥♥♥♥♥♥♥ allied faction sent their reinforcements, barged their way through my forbidden doors and engaged the enemy in my maze.
Please tell me theres a way outside of mods to tell them to ♥♥♥♥ off and still keep them as allies.

EDIT: Still haven't found a way. Thinking of activating an animal pulser and hoping they get mauled.
I have never come across friendly AI this detrimental, its obtuse.