With this logic, you can avoid everything in any NAP if you just rent anything (hey, wanna rent my faction to attack the fcc for ten gold? Ok!)
The NAP said no supplying enemies... But whatever.
What about NAP breaking, don't even bother to start discussion, you shoulnd't have attacked Nothern Empire, but you did! Still, knowing what a good deal-breaker you are, I made a troops rent act with Templars, you can't call it "help". Mercenaries can approve that.
I'm so tired of you people who are lazy enough to say things before reading text.