Triggers - what's possible and what isn't?

[Roy1991]

I'm thinking about creating a small mod to make crusades more interesting.
It'll require a lot of triggers, and because I have only little experience with those so far (only did some basic triggers in RTW), I thought I'd first ask what's possible and what isn't, before I start messing everything up


- Can the conquest of a specified settlement be the trigger for a new faction to emerge?



If the answer to the above question is positive I'll add some more questions, if it's impossible just forget about this thread, because in that case the whole idea for the mod won't work

Thanks in advance.