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
Serbs of Bosnia and Herzegovina Montenegro took advantage of this weakness and attacked the Ottoman Empire in 1876, soon after the Russian Empire did the same. The Turks lost the war in 1878. After the Congress of Berlin was held in same year, mandate of Bosnia and Herzegovina was transferred to the Austro-Hungarian Empire. More specifically, In 1875, the Herzegovina Uprising broke out in the Bosnia Vilayet. On July 2, 1876, Golub Babić and his 71 commanders signed the "Proclamation of the Unification of Bosnia with Serbia". This event is often known, among Serbian historians, as the "Third Serbian Uprising". This rebellion directly led to