Bosnia (region)
Bosnia (/Босна; ) is the northern region of Bosnia and Herzegovina, encompassing roughly 81% of the country; the other eponymous region, the southern part, is Herzegovina. "Bosnia" is an informal term for the whole country.
SAO Bosanska Krajina
The SAO of Bosanska Krajina (, ) was a self-proclaimed Serbian Autonomous Oblast within today's Bosnia and Herzegovina. It was sometimes called the Autonomous Oblast of Krajina (, ), or the Autonomous Region of Krajina (ARK). SAO Bosanska Krajina was located in the geographical region named Bosanska Krajina. Its capital was Banja Luka. The region was subsequently included into Republika Srpska.