Demographic history of Bosnia and Herzegovina of Catholic preachers. Preottoman Catholic population had a great share in the emigrations from Bosnia and Herzegovina. The emigration flows were directed towards Dalmatia, Croatia, Slavonia, Baranja and north-west Bačka. The western part of today's region of Bosnia, today known as Bosnian Krajina, was taken by the Ottomans in the 16th century, and was for some time still known as "Turkish Croatia", as its once overwhelming Catholic and Croat majority disappeared and the Ottomans entrenched the new border along the Sava and Una rivers. After more than a century of military losses, the Habsburg Empire waged some victorious wars against
Kostajnica, Bosnia and Herzegovina Kostajnica, Bosnia and Herzegovina Kostajnica (), is a town and municipality located in northern Republika Srpska, an entity of Bosnia and Herzegovina. It is situated in the part of the Кrajina region. As of 2013, it has a population of 5,977 inhabitants. The municipality was created from part of the pre-war municipality of Novi Grad. It is located across the Una from Hrvatska Kostajnica, Croatia. During the Bosnian War, it was renamed to "Srpska Kostajnica" (Српска Костајница). After that, name of the town was changed to "Kostajnica". According to the 2013 census results, the municipality has 5,977 inhabitants. In the