Quickest collapse you've seen?

[Martok]

The quickest collapse i've seen was my own. I was playing as the Byzantines, there was a civil war and I chose the wrong side(loyalists) and the rebels defeated me easily. My empire fell in 2 turns.

Uff da! That's rough, man. Were you that badly outnumbered by the rebels?

@The Unknown Guy: Yeah, I've seen massive collapses like that in my games. Indeed, I would guess that most of us have at some point or another -- the bloat effect is simply too widespread, and no faction is immune.

I remember one of my Egyptian campaigns where the Spanish had a rather spectacular collapse. After I defeated one of their Crusades, their entire empire (which was at least 40 provinces by that point) promptly fell into civil war. The French, Almos, & Aragonese all re-emerged, and I didn't have to worry about them again.