How is province ownership determined?

[Warhammer: 3025]

When capturing territory, I can't seem to understand how the game assigns ownership of territory. Sometimes my nation owns the territory, sometimes someone else.

How does the game determine who owns what?

 

[redrum68]

Its mostly based on the owner of the territory you are attacking from (if you attack from you're allies territory then they get it). Though I've also had some cases where it shows me as the owner of the provinces but one of my allies gets control of the state.