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
Croats of Bosnia and Herzegovina western Serbia and later part of the Kingdom of Croatia, which he accomplished by defeating various Croatian nobles and supporting Hungary. Thus, the Kingdom of Bosnia emerged, but part of present territory of Bosnia and Herzegovina remained in the Kingdom of Hungary. Regarding religion, Bosnia was closer to Croatia than the Orthodox lands to the east, and the Diocese of Bosnia is mentioned as Catholic in the 11th century, and later fell under the jurisdiction of the Archdiocese of Split and in the 12th Century under the jurisdiction of the Diocese of Dubrovnik. Another connection of Bosnia with Croatia is