What happenes?: I break siege, new army moves in.
 

So what happenes if you break siege, kill the sieging army, and a new army moves in? Will there be two battles with both armies or just one?

Re: What happenes?: I break siege, new army moves
 

Well, according to my manual; if you succeed in your break siege, then movement based battles would occur, so you would then fight a defensive fight against the new army.

Re: What happenes?: I break siege, new army moves
 

Thinking back now, I think when the enemy has an army at the castle, you break siege, and the enemy "backs up" the army with a new army, both armies would be combined in the ONE battle, HOWEVER...

my situation is different. There's TWO enemies. Enemy A is sieging. I break. Enemy B moves in. Is there a battle with B or no?

Re: What happenes?: I break siege, new army moves
 

Assuming none of the armies are using magical movement, the turn resolution sequence is:

12. Friendly Movement. All movement ending in a friendly province takes place.

13. Other Movement. All other movement, including break siege.

14. Movement battles.

15. Castle storming.

One question is, what is the affiliation of the "new army" that moves in? Here is how it is supposed to work, according to the manual, assuming the Besieged army does a break siege:

If the Moving Army is the same nation as the Besieged Army, then the Moving Army and the Besieged Army will group together and fight a single battle against the Sieging Army.

If the Moving Army is the same nation as the Sieging Army, then the Moving Army and the Sieging Army will group together and fight a single battle against the Besieged Army.

If the Moving Army is a third nation, then one of two possibilities can occur, randomly:

1) The Moving Army fights the Sieging Army, and the victor then fights a subsequent battle against the Besieged Army

or

2) The Besieged Army fights the Sieging Army, and the victor then fights a subsequent battle against the Moving Army

Re: What happenes?: I break siege, new army moves
 

Replace all occurences of "besieged army" with "siege breaking army". Battles from movement phase happen like vfb wrote. Then, if there are still commanders left that were set to "storm castle", those proceed to fight the defenders.

Re: What happenes?: I break siege, new army moves
 

Yeah, that's what I meant by "assuming the Besieged army does a break siege". Bah, would have been clearer if I just wrote it the way you suggest.

Re: What happenes?: I break siege, new army moves
 

It's the easiest to think of a siege break as a zero distance movement. Battle's outside, the usual rules concerning battles from movement apply.

Re: What happenes?: I break siege, new army moves
 

i dont remember that, but what can happen is after winning the break siege, the new army sieges the fort without a fight since breakers are not on patrol.

Re: What happenes?: I break siege, new army moves
 

Torin, that's what I figured made sense.

Re: What happenes?: I break siege, new army moves
 

Torin's answer is in most likelihood the correct one. Such behavior would also be consistent with the behavior bugs related to events causing indie attacks in provinces where a castle is under siege.