Consider the passage of time, yes, with regards to how long it takes to build stuff, or how long it takes to combat opposing realms, etc. But it sounds like you're looking for domain events specifically, which I'd recommend looking around online for.. there are a fair number of supplements with tables for events, I used some of them in my (too brief) Birthright-inspired game. I imagine if ACKS has it, that'd be a good source as well.Do any of these supplements consider the passage of time? One thing I am looking for is something that generates domain events over the years. Famine, extreme weather, tragic death or celebrated birth of an heir, discovery of a new resource, &c.