I'm playing the Iroquois, westernized, got a foothold in Europe, everything is nice. I don't have any PUs. Now all of a sudden, the game says that the ruler of Burgundy died, without an heir, so Castile gets a PU with them, unless I contest the succession, in which case a succession war starts. Question is: If I do start this war, what do I get if I win it (PU or inheriting the counties), and on which side will Burgundy fight, me or Castile? I'm attaching a screenie of the window that popped up.
